San Francisco's newly reopened hands-on science museum.

A castle that was built stone by stone by an eccentric journalist.

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

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A hotel and restaurant serving as the mecca of kitsch.

Towering basalt columns, a creation of fire and ice.

Shop selling 500 flavors of soda has something for everyone.

America's most famous piece of self-built architecture.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

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

A trash dump made beautiful by nature's power.

A one-of-a-kind collection of a unique medium.

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

The legendary building that needed ghostly approval before being built.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.