These colossal desert barcodes have been fine-tuning spy satellites for decades.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

In California, colorful roadside signs remind us all that love transcends borders.

This outdoor observatory offers stellar views and a scale model of our solar system.

The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

The decaying adobe remains of an old homestead are just off the beaten path in Joshua Tree National Park.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

A collection of haunted objects and macabre oddities under one roof.

Decades' worth of lost and forgotten objects make up the collection of this tantalizingly odd little museum.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

This "synagogue" is not what it seems to be.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

A shrine to a skeleton saint in the city of angels.

The site of the house Jack Parsons made famous both in life and death.

Educational foundation that teaches the powers of fourth dimensional physical properties.

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

A hidden subterranean installation offers a view of the sky.

A modern mechanical planetary system, part of a 10,000 year clock.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.