A giant donut stands as a popular symbol of Los Angeles iconography.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

A Wild West saloon that helped define a generation of psychedelic rock.

Back in the day everyone who was anyone played this historic western theater.

Ruins of the original wooden flume that carried water to Virginia City are still visible high on the Virginia Range.

One woman's Viking Castle on Lake Tahoe.

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

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

The site of Paul Revere's historic two lantern warning.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Yo, Adrian!

Despite its name, this route in southern Utah offers a heavenly day trip.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

A lawless town deep in Death Valley was famous for its riches and death rate turned YouTube famous.

The largest source of fossilized insects anywhere.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The land is home to swimming ponies and a legendary 18th-century treasure.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.