This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Two dozen pinball games hidden away inside a most unlikely location.

A remote horde of architectural treasures fit for Indiana Jones.

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

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

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

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

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

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Nothing says indulgence like a 1,500-pound chocolate castle.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

Where the "World Pinball Champion” is crowned.

A quirky collection of outsider art made from automobile parts.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The abandoned coal loading dock is a canvas for unsanctioned art.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

The graffitied ruins stand hidden within the Pennsylvania woods.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.