This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

The world's largest military aircraft cemetery.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

This church on a Tohono O'Odham reservation has stood since 1797.

A humble garage, world-famous for being the epicenter of a technology revolution.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

The mysterious round rocks of Schooner Gulch.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

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

Travelers exchange letters with woodland creatures at this mini post office.

The oldest house in the capital of Silicon Valley.

A lonely monument to the original Silicon Valley tech campus.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

The restored and active Victorian-era final resting place of San Francisco.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A winding path built in secret on the edge of the continent.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.