Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

The nearly 120-year-old piece of pork wears a brass collar and was once a man's "pet ham."

Home of a 28-foot tall stalagmite known as the War Club.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

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

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

The land is home to swimming ponies and a legendary 18th-century treasure.

An overlooked memorial honoring the local Washington residents who died in World War I.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

One of Ireland's most infamous prisons for rebels including men, women and children.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The fifth-longest natural arch in the world, and the longest outside China.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.