As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

These strikingly barren, rolling red hills were caused by bad farming practices.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

The tallest stationary dunes on Earth also happen to sing.

Once the home of a hermetic monk, this cave now houses a small church.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

An intricate and amazing house built by architect Karl Junker.

A deadly ancient portal to the underworld.

An ancient city exhumed from the depths of the ocean.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

New fungal and bacterial species call this deadly lake home.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

This semi-secret storybook hedge maze is also the oldest garden in the city.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This famous city eluded concrete detection until the early 2000's.

270 million year-old forest of stone.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Steaming blood-red hot spring from hell.