"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

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

Enormous lake at the bottom of a unique cave system.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

Every week, a festive public jam session breaks out in downtown Asheville.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

An eerie smiling woman looms above the granite tombstones.

This kitschy tavern is also home to rare early editions of "Treasure Island."

"X" marks the spot of an echo chamber in the middle of a plaza.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

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

The secret city built by the Manhattan Project.

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

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