Water

One of the last free public hot springs is decorated with hippie art.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.

A public fountain that spouts "health water" from a nearby spring.

Haunting and beautiful trees, doomed to die.

The most powerful waterfall in all of Europe.

A steaming, boiling hellscape sources Hokkaido's thermal baths.

An industrial site turned into Hungary's most cherished natural wonder.

A tiny waterway named after a ghost story.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

This vast, water-filled underground labyrinth can only be toured by boat.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

A mysterious echo seems to defy the laws of acoustics.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

This restored 17th century "conduit house," often mistaken for a watchtower, actually supplied water to nearby Bolsover Castle.