This peaceful oasis appears dreamy, but it's also the site of a nightmarish legend.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

These azure waters were thought to lead to the Mayan Underworld.

A rotting air force base is now home to rare birds and scarce plants.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

For over 300 years this little carving has been the city’s good luck charm.