The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Hidden in the back of a disused small town hotel is a dive bar shellacked with over a million pennies.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

One of the last free public hot springs is decorated with hippie art.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

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

A dwindling menagerie of anthropomorphic oil derrick animals still dot the barren California landscape.