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

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.”

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

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

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

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

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

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

The 28,000-year-old specimen is remarkably intact.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

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

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Washington's iconic carousel has a nice piece of Civil Rights history.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A giant ball made from pieces of an old Jeep.

The centerpiece of the Delta Blues Museum is a wooden sharecropper’s cabin that once housed a titan of blues music.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

Where the "World Pinball Champion” is crowned.

Pittsburgh's literal underground railroad.

Belly up to the bar in Cowtown, don't forget to buy some boots.