The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Oldest building in California still in use.

This mission, established in 1771, is the most remote of California’s Franciscan missions.

The ruins of a military outpost from the 1860s form the centerpiece of a Nevada state park.

The current Eureka County Courthouse replaced an all-wooden structure that had previously been an ice-skating rink.

This Old West eatery along America's Loneliest Road was originally a stop on the Pony Express.

Browse an impressive collection of passenger and military aircraft dating back to World War II.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A motel dedicated to Southwestern nostalgia.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

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

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

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A sharp bend in a dramatic river canyon cut through red rocks.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

The oldest continuously occupied public building in the United States.