2. Cave of the Crystals (Naica, Mexico)
Google the name and check out the pictures available on the Internet. You simply must see what this location looks like. Pay attention to the person for scale. Just imagine – all those crystals are 40 feet long. Sadly enough, crystals are reported to decompose in oxygen. That’s why tourists and scientists are trying to race against the clock – they take photos and document the area before it is ruined.