A museum befitting the city responsible for supplying the majority of the world's LSD.

A modernist landscape of water and sci-fi concrete.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The first American department store, and home to the largest operating musical instrument in the world.

Opulent downtown movie theater now houses cars as an indoor parking garage.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Flamboyant architecture from the turn of 20th century.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

The largest collection of two headed animals in the world.

Bridge that died in war and was resurected.

A Museum of Holography frozen in 1974.

A hot dog stand where the heads are just as hot as the dogs.

An vast warehouse of everyday treasures in Berkeley, CA.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A beautiful geyser under environmental threat.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

A world-class collection of mechanical musical instruments and automata.

A open air theatre built on a cliff by an eccentric British woman.

Home to the "Circus" trees created by Axel Erlandson.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.