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

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

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.

Mile-long cave system near Great Smoky Mountains.

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

More than five miles of underground passageways.

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.

The secret city built by the Manhattan Project.

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

A unique columnar residence built in the 19th century.

This old mill and former police station now present a world-class collection of Orthodox iconography.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

One car at a time please.