The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

The romance of early commercial flight still fills this Art Deco destination.

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

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

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The narrowest house in America is seven feet of pure spite.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

One street divides a single town that stands in two U.S. states.

The oddly shaped, steam-spewing building is now an art studio and gallery.

An alternate history park where the Union Army loses the war... to dinosaurs.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

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.

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

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

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