A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

This giant temperature attraction created some giant electric bills.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A second generation sun-powered marvel lights up the night.

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

Explore 10 acres of environmental sculptures.

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

A mysterious "wedding cake" castle in the middle of the urban desert.

The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

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

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

The alley connecting two of country music’s most historic venues has a rich history of its own.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A reimagined 19th-century Acadian village featuring authentic Cajun-style homes filled with artifacts specific to the period.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

The first plantation museum in the United States to focus on the lives of enslaved people.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.