An eerie, derelict amusement park in Berlin.

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

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

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A psychedelic labyrinth on the San Francisco bay.

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

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

On the Oregon coast there is a natural hole that seems to be draining the sea.

A crumbling hospital from the 1850s on Roosevelt Island.

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

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

World's first "penitentiary," meant to be humane, drove men insane.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

An exquisite tunnel of cascading flowers.

Rippling sand dunes frozen in the Arizona rock.

An artsy hidden staircase leads to breathtaking views of San Francisco.

On Japan's Tashirojima Island, cats are king.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A terrific purveyor of natural history objects and curios.