The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

A bizarre roadside attraction and the first instance of miniature golf in the world.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This two-room shotgun shack in Tupelo is the birthplace of a King.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

One person's lost luggage is another person's treasure.

Victorian-era Egyptomania left its mark on this Nashville landmark.

This award-winning men's bathroom was just too beautiful to not allow women to see.

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 Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.

Alongside this Memphis trail are several sculptures that show trail-goers how to relax.

American artist J. Alden Weir purchased this 60-acre estate for $10 and a painting.

This otherworldly church spire reaches up toward the heavens.

Community bookshelf of 25-foot-tall book spines.

A brick-paved former section of the historic coast-to-coast highway.

Every president in history is immortalized in bronze in downtown Rapid City.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The oldest continuously occupied public building in the United States.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.