This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The oldest surviving botanic garden in the United States.

The first American department store, and home to the largest operating musical instrument in the world.

Enormous lake at the bottom of a unique cave system.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

Mysterious rocks that ring musically when struck.

A layered tribute to the work of mosaicist Isaiah Zagar.

A toxic ghost town sitting atop a massive coal fire.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The world’s first penitentiary, meant to be humane, drove men insane.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.