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DailyMail.com has scoured the globe for a collection of wonders which tourists are warned to approach with extreme caution. The spots include caves, volcanoes, ice-capped mountains, and more. ....
Some of the most dangerous places can be found in the USA, Australia, Thailand, and Russia. Some are so dangerous, that tourists are banned from going. ....
The Cave of Crystals in Chihuahua, Mexico, is buried almost 1,000 feet (300 meters) beneath Earth s surface and contains giant gypsum crystal beams that are up to 37 feet (11 m) long. ....
Cave of Crystals: The deadly cavern in Mexico dubbed 'the Sistine Chapel of crystals' yahoo.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from yahoo.com Daily Mail and Mail on Sunday newspapers.