One of the ghostly stops along Route 66.

This 19th-century church is now a popular roller rink.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

One of the last free public hot springs is decorated with hippie art.

The ghost town that ended up on Ebay.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The Ozarks' strangest dwelling.

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

The stone circle honors the 19 firemen who perished during the Yarnell Hill Fire.

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

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.