A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

This former fire tower found new life as a communications hub complete with a scenic overlook.

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

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

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

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.

Memorial stone for GWAR vocalist, depicted in his iconic costume.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

A small Richmond island dotted with the remnants of hundreds of years of history.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

Though his role as the inventor of baseball may be up for debate, fans still festoon Doubleday's grave with baseballs.

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

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

Recorded as the first person buried in Arlington Cemetery.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.