The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Perhaps the most scandalous statue of America's first president.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

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

The maritime museum that boasts the largest nautical library in the western hemisphere.

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.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

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

The resting place of a Civil War celebrity's amputated limb.