One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

An unrealized Taoist palace left abandoned in a Houston suburb.

Soaring over the Niagara Whirlpool since 1916.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

Three hundred years of preserved Spanish colonial history in San Antonio.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A monument celebrating the idea of reaching inaccessible places.

These boots are made for selfies.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

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

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

A taste of Middle Earth, in the middle of the Bayou City.

A private collection of massive steel monsters guarding a Texas pipe works.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

255 feet of suds, scrubbers, and blow dryers.

Official museum, hall of fame, and repository of the Texas Rangers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.