Memorializing an American tragedy of massive proportions.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

An eerie, decaying ghost town destined to fade into the forest.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

The largest land animal skull ever discovered.

A museum dedicated to exhibiting remarkable outsider art.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.