The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

Follow the path behind this treat-slinging camper van to a sculpture garden in the forest.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

This abandoned Victorian-style house was built in 1884.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

The land is home to swimming ponies and a legendary 18th-century treasure.

Bizarre Cavern.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A museum dedicated to exhibiting remarkable outsider art.

An eerie, decaying ghost town destined to fade into the forest.

This free, take-a-book shop seems like a trick but isn't.

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

America's smallest town is run by its single citizen/mayor/librarian/bartender.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Largest gathering of hobos in the country has been meeting annually since 1900.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.