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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

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

A snapshot of the city's fascinating voodoo culture.

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

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

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

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

A crumbling hospital from the 1850s on Roosevelt Island.

Rippling sand dunes frozen in the Arizona rock.

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

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

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

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

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

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