I think most of us have at least heard of the "Seven Wonders of the Modern World." We might not be able to rattle them off as easily as McDonald's value menu items, but chances are you've heard of at least some of them, right? Every state in the nation is known for having a series of natural wonders and signature landmarks. So, I thought I would come up with my own list of the "Seven Wonders of South Dakota." Get our free mobile app The following is what I consider to be the signature landmarks, monuments, and natural wonders that are synonymous with the great state of South Dakota. I tried to give both sides of the state a little love while comprising this list. You might have a few additions? Feel free to mention them on our Facebook page.