A library of rare occult books in Los Angeles.

Radioactivity still cause for concern at this urban explorer's paradise.

Where Nor'easters go to die.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

Their motto is, "We've been bonkers for hats even longer than you have!"

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

An institution that preserves the history of institutionalization.

Only known mainland rookery of the threatened Stellar sea lion.

Treehouse motel and treehouse-building school.

Private collection of art inspired by cabinets of curiosity.

The old fire tower is one of the last of its kind in the United States.

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.

An invitation-only museum of items natural and bizarre, arcane and exotic.

New fungal and bacterial species call this deadly lake home.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

An entire town preserved as a historic landmark.

These giant metal horses graze on a hilltop near the Montana highway.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

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