Jail from the 19th century that was built by inmates.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

Dubbed the "smallest church in America," this tiny sanctuary was a local grocer's dream come true.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

This historic Australian bridge was built by convicts with giant stone spikes to prevent cattle from falling off the sides.

A natural rock bridge towers above the sea.

A historical umbrella shop, whose owner started a craze for locally-made souvenirs.

This extraordinary geological oddity resembles human-made pavement.

In Tasmania's "Valley of Views," dozens of novelty mailboxes add a quirky element to the landscape.

A life-sized statue marks the spot of the 100-meter-wide "neck" that leads to the Tasman Peninsula, and the convict penal settlement was once guarded by a line of ferocious and savage dogs

Water of undetermined depth has attracted rare fish and cult leaders alike.

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

Traces remain from early Cold War experiments on the vulnerability of underground installations to surface explosions

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

A small museum dedicated to the king of Western swing.

Two well-preserved charcoal kilns survive in a remote part of eastern Nevada.

A Prada store in the West Texas desert that is never open for business.

Mysterious glowing orbs float through the desert night.

Once called the Jersey Lilly, this former saloon was the domain of infamous Judge Roy Bean.

Beauty and history abound in this remote West Texas canyon.

The oldest continuously occupied public building in the United States.

A natural formation that resembles a camel resting in the New Mexico desert.