The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A museum dedicated to a Cold War era sausage.

Poseidon? No one seems to know.

When it opened during the final years of the embargo, all the drinks and cigars were free.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A Hungarian pharmacy museum with a box full of mummy powder.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

The U.S. government built the million-pound stack of steel during the Space Race.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A Civil War Museum with some notable medical antiques.

Built by the patriotic residents of Boonsboro in a single day.

Bizarre Cavern.

One of the only memorials dedicated to journalists who died in combat.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.