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.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

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

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

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

This antique shop offers affordable 15th-century Vietnamese ceramics salvaged from a local shipwreck.

This tiny Vietnamese village is known for eating snakes and serving their still-beating hearts in shots of vodka.

This cavern was used as a hidden hospital and safe house during the Vietnam War.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

A desert in southeast Asia, complete with a beautiful lake covered in lotus flowers.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

World's largest cave was only discovered in 1991, and now offers tours to the public.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Journey through vintage Americana inside this small Massachusetts shop.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.

This abandoned ironworks was once the most important military supplier in America.

Reforestation in action is the main attraction in this abandoned quarry.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Collapsing castle on the Hudson river was once the storage site of military surplus business.