The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

A room hidden behind a swinging shelf in the children's section.

An antique cemetery in New York, this land is home to any number of famed corpses.

An old dining hall now serves up ghost stories for lusty locals.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

The library of every book lover's dreams.

Visible below the waves are memorials to the city's Gold Rush dead.

A psychedelic labyrinth on the San Francisco bay.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A 300-ship graveyard, with a few still visible at low tide.

The remains of a ruined mansion memorialize the 1906 earthquake.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Olfactory delights in San Francisco's Botanical Gardens.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

This shop specializes in oddities and Victorian-inspired wonders.