The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

You can climb to the summit of Black Mountain, as long as you sign the waiver.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Enormous lake at the bottom of a unique cave system.