When in Idaho, sleep in a giant potato.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Meet Rita the Rock Planter, one of Danish sculptor Thomas Dambo's enormous wooden trolls.

A renovated hotel is bringing new life to a nearly-abandoned mining town in Colorado.

A shockingly detailed small scale recreation of the temples of Abu Simbel.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

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

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

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

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A snapshot of the city's fascinating voodoo culture.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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