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

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

Its buzzing collection honors vibrator history.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

The rocks in this arid basin leave trails of movement behind them.

This shop specializes in oddities and Victorian-inspired wonders.

Medical and zoological curiosities for sale.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A 140-year-old castle with underground caves hidden in San Francisco.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

World's largest collection of serial killer artwork and other macabre exhibits.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A formerly abandoned mental institute, now back in business.

This decrepit abandoned building is made all the more eerie by its dark history.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

Once known as the Illinois Asylum for the Incurable Insane.

An abandoned asylum where patients have been forgotten but their possessions remain.