This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

Where pardoned turkeys once spent their all-too-brief final days.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A former major munitions plant that has been converted into a sprawling art space.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

The only recreation of William Shakespeare's indoor playhouse.

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

Outsider art meets paleontology at this roadside reptile repository.

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

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A monument marks the location of the first successful steamboat demonstration.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The world's largest fully steerable radio telescope.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Take a steam-powered ride straight out of the past on this Appalachian rail line.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

This Seattle joint serves food inside an old train car once used by FDR.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.