An unexpected sinkhole in a desert flat within Gold Butte National Monument.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

A quarry cum sculpture park where the works of art are chiseled into the very walls.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

This crack in France's seaside cliffs once hid a sinister secret.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

The sunken structure looks like the victim of a catastrophic flood.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

A granite rock formation littered with various species of moss, lichen, and fern.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

An enchanting work of outsider art, full of whimsical sculptures and carvings.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

Shrine dedicated to boars that is believed to cure foot and leg injuries.