Most-visited and most-photographed slot canyon in the American Southwest.

An eerie, derelict amusement park in Berlin.

An exquisite tunnel of cascading flowers.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A swing to dangle you off the very edge.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A magical place that lets you play in and explore the world of Studio Ghibli.

Rippling sand dunes frozen in the Arizona rock.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A church of bones, decorated with 40,000 human skeletons.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

An emerald-green grotto just a short trip from Austin.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

On Japan's Tashirojima Island, cats are king.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

One-layer pyramid in Indiana.

This abandoned cemetery has a dark past of bodies buried over bodies.

The world's largest anatomically accurate brain sculpture.