A floating cat sanctuary on an Amsterdam canal.

This living labyrinth made entirely of thorns is filled with art.

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

A rare labyrinth-style path carved into a historic hill.

A walk through the historic city center, under the streets of Seattle.

A layered tribute to the work of mosaicist Isaiah Zagar.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A giant Troll lurks under one of Seattle's oldest bridges.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Try not to get slimed in Tribeca.

Black cat statues guard this temple-like Egyptian revival factory.

This 1920s Dutch barge is now a floating bookstore.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A bizarre house filled with an astounding array of collections.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

On Japan's Tashirojima Island, cats are king.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The world's only museum devoted to the wonders of fluorescence.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An enormous, inside-out glass globe built in 1935.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.