Eons ago, a rushing lava river formed this pristine passage through solid rock.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

A replica of the flagpole that gave a frontier town its name.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

A UFO scrapyard in the California desert.

Outsider Art Community.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

Ancient pueblos built into the base of a natural canyon wall.

An artificial crater field that trained astronauts for lunar exploration.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

Lemon Grove, California is known for its giant lemon...and mummified bodies.

One of the largest trees of its kind in California.

A couple turned their front yard into an artistic masterpiece.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

Lucha Libre (Mexican Wrestling) themed taco shop.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

When this 160-year-old church was being built, a stonemason included a hidden homage to his late daughter.

The clock that sets them all.