Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

The United States Capitol's former columns still stand.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A diorama of the Civil War, fought by cats.

Yo, Adrian!

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

An outlandish shoe shaped house built by an eccentric millionaire.

Steepest flood safety railway in the entire world.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

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

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

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

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

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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

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

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.