Glass to all the boys and girls weve loved before. And record breaker. What do despacito and one sweet day have in common . Well find out. But first the nightline 5. Number 1 in just 60 seconds. Good evening and thanks so much for joining us. Its certainly hard not to want to snap a picture of that beautiful sunset or pristine landscape. Especially when its inside our National Parks. But what of our collective search for the perfect post for the gram is endangering the very places we want to photograph . Heres abcs maggie rulli. Reporter theyre some of the most aweinspiring natural wonders in the country. Oh, wow. Oh, man look at that. Reporter Horseshoe Bend, the grand canyon. Zion National Park. And the wave. Omg were about to enter the wave, and it looks so freaking cool already. I saw some pictures from the instagram. So we decided to come to here for our summer vacation. Reporter these stunning backdrops lure millions of visitors with the promise of a perfect post. People are just taking selfies and not really enjoying where theyre at. Its kind of like oh, i got my selfie, lets go home now. Reporter its a social media goldmine. But for some locations insta popularity proving to be too much of a good thing. Social media has focused so much attention on particular places that they really are at risk of being loved to death. Reporter with throngs of visitors causing irreparable damage during the recent california poppy blooms and at Joshua Tree National park, some of our public lands are now threatened by overcrowding. We set out to see how these National Treasures are doing with crowds being driven in part by social media. Horseshoe bend was once a littleknown spot in arizona where locals would hang out to catch the sunset. But almost overnight an overlook that once saw 4,000 visitors a year began seeing 2. 2 million visitors a year. Thats over 4,000 visitors a day. 2015 was when it really exploded. Thats also when we saw this huge rise in social media, especially instagram. I think its a huge contributor. We provided the railing so people can take that safe selfie. Reporter that new railing part of a larger effort to manage the explosion in crowds which were causing trash buildup and safety concerns. And how important is that, keeping up with the infrastructure . Well, if we didnt invest in the park we would see a lot of resource damage. When you add 2 million visitors to a place like Horseshoe Bend, you have to manage human waste and trash. We just saw page, arizona, a place dealing with this onslaught of tourism. Now were heading to the grand canyon, a place that knows tourism really well. Were going to check out the north rim, which people tell us is supposed to be a little bit quieter. Holy smokes. Welcome to the grand canyon. Oh, my god, i love it. Reporter Jerry Ginsberg has spent the last 30 years photographing every Single National park and many of our public lands. One thing that makes me very sad is to see canyons and forests and trees that were formerly very pristine just completely destroyed and with a greater influx of people it creates more wear and tear and eventually given enough time theyll lose their scenic attractiveness. Reporter for young and upcoming photographers many of them use instagram as their medium, so why shouldnt they be given their chance to get instagram photos at the same places where you were able to take your photos 20, 25 years ago . I hope they are. I hope they can and do that and give them fresh interpretations. They may have to go out on their own and find new and different places to create original images. Reporter right across from the south rim of the grand canyon, one of the busiest portions of this National Park, here we are at the north rim and its almost complete solitude. Went to Horseshoe Bend the day before yesterday. Reporter thats where we met chad roso, who had just come from visiting Horseshoe Bend. What made us go there was the whole instagram blowup. This is a whole different experience. Reporter how would you compare the two, Horseshoe Bend versus north rim . This is like you said solitude and thats a zoo. Reporter and yet just 2 1 2 hours and one state away zion National Park, only 15 miles in diameter, attracts 4. 5 million visitors a year. Thats nearly 2 million more visitors than yellowstone receives at a fraction of the size. Were definitely having issues keeping up. Reporter ali baltrus has been with the National Park service for nearly 30 years. Well get you on the next one. Back in 2012 we had really no lines. So if you had told me that i was going to be running a shuttle line and have people staffing the shuttle line in order to board shuttles i would have laughed. We started seeing more crowding around 2013 and it kept going up from there. Reporter its morning and this line is still hundreds of people deep. The park ranger told us it starts about 5 45 a. M. And it stays this way all the way through 2 00 in the afternoon. Reporter despite the lines, the shuttles and the heat, everyone we met said they were having a great time. Especially at the narrows. A breathtaking river hike thats one of zions most popular attractions. You can still enjoy it even though its kind of crowded . You just go around them, try to enjoy your time, dont let them get in your way. Reporter but not every instafamous location is open to zionsized crowds. Were about to enter the lottery to see if we get to hike the wave, but we were told wed probably have a better chance of winning mega millions. Reporter every year more than 150,000 people apply to visit the wave, a rock formation on the arizonautah border. But just under 10,000 are selected. With only 20 visitors per day, the wave is one of the most restricted public lands in the u. S. 9 00 we will draw for 10 selected spots. Reporter inside we meet paul laboulet, a german tourist whos applied five times. It just looks so cool. I want to do it. Reporter when did you first see a picture of the wave . Probably on the windows screen saver. Reporter that windows desktop picture made the wave one of the first ever viral destinations. The wave has been featured on social media. Were seeing really a dramatic increase in the number of people that want to come out and visit. Reporter mike herder works with the bureau of land management. He says the agencys considering opening up the wave for up to 96 permit holders per day in part due to high demand. Thats more than 400 the amount of people were letting in now. What were doing with the wave really is doing a environmental assessment. Can we in fact increase the number without tipping that balance where solitude is lost . And it just becomes a line of people that are coming through this spot. Reporter so what are the dangers of this . Potentially spoiling a beautiful place. It would be very challenging to put 96 people into the wave because its a relatively small feature. Reporter tara mckinnon from the center of biological diversity worries that the feature is already endangered at current use levels. Its an american right to enjoy public lands, but its also our obligation to ensure that were not ruining these places, these very fine delicate sandstone structures. Even under the current use levels were seeing impacts that the b. O. M. Never anticipated. Reporter while exploring the trail head near the entrance to the wave taylor showed us one of the reasons why this area is so protected. Heres a great example of a soil crust. Its actually alive when it rains. That crust allows the moisture to actually absorb. And its very sensitive to ast. And here you can see where old footprints look at that right there. These old footprints have destroyed it. Im not going to lie. This kind of looks just like a block of mud. It does look like a block of mud. Youre saying this is important . The soil crust aesthetic unfortunately doesnt nearly match its ecological importance out here. Reporter our chance to further explore this delicate ecosystem rests in this bingo cage. All right. First lucky person is number 10. Do you want it . Its number 11. What did you think when they called your number . Excited. Yeah . Reporter 4 00 a. M. Wakeup call. We are up and ready, heading to hike the wave. We set out just as the sun was rising over the desert. With Cory Unsworth whos been leading tours to the wave for five years. We are currently in utah headed toward the wave. Reporter and when we finally arrived this is the first thing they see. Reporter it did not disappoint. Is it everything you thought it was going to be . Gorgeous. Reporter for cory its all about striking that delicate balance between nature and those who are seeking to bask in all of its glory. Youre a tour guide. Your company would benefit if they opened up more tours to the wave. Yet you still dont want more people in here. No. I do this because i love it. This is one of those spots you dont yet have that overcrowding sensation. So its nice we still have a few place as round we can go and still have a unique experience on our own. Reporter for nightline im maggie rulli on the arizonautah border. And up next, falling in love with pretty woman. Celebrating some of hollywoods most memorable fairy tales. Celebrating some of hollywoods most memorable fairy tales. With moderate to severe ulcerative colitis, are you okay . Even when i was there, i never knew when my symptoms would keep us apart. So i talked to my doctor about humira. I learned humira can help get, and keep uc under control when other medications havent worked well enough. And it helps people achieve control that lasts. So you can experience few or no symptoms. Humira can lower your ability to fight infections, including tuberculosis. 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And ask about even more savings with xfinity mobile. Click, call or visit a store today. They are the movies we love to love. Romantic comedies. Theyre cute, funny. Okay, sometimes cheesy. Now as rom coms are moving into a new modern chapter fans are getting a chance to show their true love with the classics. Who can forget the moment richard gere snaps down that jewelry box in pretty woman . Oh reporter or aunt vula in my big fat greek wedding. He doesnt eat meat. You dont eat no meat . Reporter iconic moments from some of hollywoods most beloved films. And lately a movement has been afoot to give them their due. Take katz deli in new york city. Oh oh reporter recently inviting people to relive the when harry met sally scene. Ill have what shes having. Reporter with an ill have what shes having contest, seen here on tmz. Yes yes oh oh reporter and here in los angeles welcome to rom com fest. Reporter the first ever rom com fest. A gathering to celebrate romantic comedies and all they represent. From rainy day movie treats to a photo op for you and your besties. And special screenings of some teenage classics. This is my dream festival. Its romantic comedies and dessert. The world is so full of chaos that you kind of need a place where you can be kind of happy and gentle. Its not just you walk in, watch a movie and leave and go back to the harsh reality of the streets of los angeles. Reporter miraya berke is the 29yearold founder behind this labor of love. I wanted to create these environments that really spark joy and celebrate love i think is so important right now. Reporter one of the guests of honor, actor, writer and creator rachel bloom. Im just a girl in love of musical dramedy crazy exgirlfriend. I think that its cool that the rom com is getting venerated in this way because for so long you had this term chick flick. And what that connotes is any movie geared toward women is lesser than. Reporter in the 90s romantic comedies introduced us to beloved onscreen couples like meg ryan and tom hanks. Shes beautiful but shes a pill. Reporter leaving us sleeplessly yearning for more. So we got mail. I have a terrible cold. Reporter rom coms were clearly having their moment but in the 2000s it was harder to get these feelgood films made on the big screen. A lot of studios hadnt figured out how to make a romantic comedy that worked as a film and made sense for them financially. Reporter on the big screen crazy rich asians dominated the Box Office Last year with a whopping 238 million globally. And streaming Services Like netflix investing in romantic comedies like the wildly popular to all the boys ive loved before. Heres the thing. I had to make it look like i liked you so somebody else wouldnt think i liked them. Reporter producer matt kaplan and his team are working on the films sequel. To all the boys ive loved before has been seen by over 100 million households. Which is just crazy. Reporter to all the boys was the film screen adaptation of a popular young adult novel of the same name. Stories about love and identity and family are always going to want to be told. I think now we have specific audiences like to all the boys i loved before where you can focus on a koreanamerican family is something truly special that traditional studios werent willing to bet on. Reporter with the emergence of streaming Services Like hulu and netflix its easier than ever to watch from the comfort of your home. Who doesnt want stuff on demand . Theatricals are a great experience but the average 20something or teenager doesnt have the financial situation to just be able to go drop 15 to 40 on a friday night. Reporter the resurgence of rom coms now making room for a new generation of writers and talent. Katie silberman wrote set it up starring lucy liu. This is how it always starts in my nightmare. What are you doing . What is he doing . Reporter shopping her script to studios around town before ultimately finding it a home at netflix. It felt like everybody was coming out of the woodwork to admit this was a genre they missed and they loved at the time. And then netflix ended up being i think the Perfect Place for it. Reporter recently she and olivia wilde teamed up on booksmart which was released on the big screen in theaters nationwide. It is very important you keep this safe. Reporter olivia wilde tweeted at the time saying we are getting creamed by the big dogs out there and need your support. Dont give studios an excuse not to greenlight movies made by and about women. Wilde, acknowledging the challenge of getting female storylines greenlit and also filling theaters. I think theres room for both the theater experience and streaming. Im still excited to watch hulus new four weddings and a funeral which is amazing. But i also am so excited to go to the theater and see a romantic comedy. Reporter returning us to a place where love conquers all. Were back at rom com fest, where fans say the genres never left. I think we relate to those themes in the modern day where a lot of chaos can be going on but you can sit at home and watch to all the boys i loved before and be like the world is beautiful. One of her favorite romcoms never been kissed before a delighted audience. Theyre fun. You get to laugh and be with aneverody really enjoys it. The creator of romcom fest says she hopes to expand the event next year. Next, taking the old town road to an all new record. You can whip your porsche ive been in a valley you aint been up off that porch now cant nobody tell me nothing i went straight to ctca. After my mastectomy, it was maddening because i felt part of my identity was being taken away. When youre able to restore what cancers taken away, you see that transformation firsthand knowing that she had options that she could choose, helped restore hope. 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They really appreciate the military family and it really shows. With all that usaa offers why go with anybody else . We know their rates are good, we know that theyre always going to take care of us. It was an instant savings and i should have changed a long time ago. It was funny because when we would call another insurance company, hey would say oh we cant beat usaa were the webber family. Were the tenneys were the hayles, and were usaa members for life. Get your usaa Auto Insurance quote today. Finally, riding the old town road to victory. Im gonna take my horse to the old town road im gonna ride till i cant no more lil nas x is hitting the bullseye. The hot new artists viral sensation old town road is now the longest leading number one hit to top the billboard hot 100 ever, dominating first place for an unprecedented 17 weeks. Toppling the previous 16week title holders, despacito. Despacito and mariah carey and boyz ii mens one sweet day. One sweet day mariah symbolically handing the torch to lil nas x in an instagram post. A rising star has rewritten what it means to be country. Releasing an extended play of old town road and coming out as a gay man. And the artist says hes just getting started. This is only the beginning. And people wont realize that until they realize it. Thats nightline for tonight. You can always catch our full episodes on hulu. Good night, america. Good night, america