This nine-story building is the oldest standing skyscraper in D.C.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

The most decorated dog of World War I is preserved in the Smithsonian.

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

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

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

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

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

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The oldest continuously operating fish market in the United States.

A line of blue paint marks the route of the inaugural parade.

A computer bug so primitive it was an actual insect.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

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

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

There's a crumbling old mansion inside the Smithsonian National Zoo.

There’s a hidden military meme engraved on the World War II Memorial.

An overlooked memorial honoring the local Washington residents who died in World War I.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

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

At 207 feet, one of the world's longest continuous escalators.