Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Stairs often replace streets on the steep slopes of this old mining town.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

Run by members of the Tohono O'odham Nation, this community farm nurtures traditional desert cultivars.

Limestone caves with spectacular showcase chambers.

One of the largest open-pit copper mining operations in the entire country.

America's only nuclear missile silo open to the public.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

The ghostly remains of an accidental sea.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

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

An exotic wildlife habitat right off The Strip.

800 apricot trees honor Silicon Valley's agricultural history.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

Burping, gurgling geothermal mud pots by the Salton Sea.

These lush groves of fan palms rise up like oases out of southern California's Colorado Desert.

An off-the-beaten path cave with an underground lake.