The small cave that housed Tennessee's "first citizen."

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

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

Visit this playground of waterfalls, caves and sinkholes.

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

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Home of an evil witch famous within southern folklore.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The arch that celebrated the completion of the Lincoln and Victory highways.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

Curiously, this large sporting goods store features 14 wax representations of American presidents.

Formerly frequented by Hollywood stars and now open for tours.

Get a taste of the Wild West and a glimpse into the gold rush in Goldfield's oldest continually-running business.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

The contents of this safe survived a 37-kiloton nuclear bomb.

Wayne Newton's sprawling estate is now open for visitors to catch a glimpse of his "heart and soul."

Singing sand that stands as the final remains of an ancient lake.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

Mysterious meeting place for UFO hunters near Area 51.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

The smallest country in the world.

Mine your own precious stones.