It's not your typical library, memorial, or book store.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

A tree grown from astronaut seeds which were exposed to cosmic rays.

A strange house built only at night, with rumored mystic inspiration.

Bits and pieces from the ill-fated Donner Party's winter cabins.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A tiny survivor of the Donner Party disaster.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A giant chess set, minus the psychedelic drug trip.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

Cows on a ranch are commonplace, scattered cow bones everywhere? Not so much.

A ruined hotel with an unlucky history and an eerie present.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Eclectic collection of dark and macabre antiques.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

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

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

An Aztec snake god has taken the material form of an apartment complex.

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

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.