The world's longest known cave system.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

This magnificent, quirky home sits atop a literal gold mine in the middle of the Nevada desert.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

World's smallest skyscraper, the product of a remarkable con.

A Roman-style column in Oregon hides a spiral staircase inside.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

The Grand Canyon of Texas.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A new kind of theme park for adults off the Las Vegas Strip.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.