These fantastically named natural pools look like something out of a Scottish myth.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Famously misunderstood wonder of the ancient world

Try not to get slimed in Tribeca.

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

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

An eerie, derelict amusement park in Berlin.

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

Medicinal spa created with the discharge from a geothermal energy plant.

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

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

The now-abandoned Fascist summer colony served a dark purpose during World War II.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

Once the most densely populated place in the world, this island is now a ghost town.

The fairy tale castle of the "fairy-tale king."

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

As the aging humans of this Japanese village die off one local artisan is replacing them with eerie homonculi.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

A grand imperial capital left to fall into magnificent ruin.

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

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.