The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

When it comes to handsignals (and colonialism) rock always beats scissors.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A building shaped like the Army Corps of Engineers logo, because why not?

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

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

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

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

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

This quirky piece of naval artillery has been deafening Canadians for over a century.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

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

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

The national park was once a plantation estate.

When it opened during the final years of the embargo, all the drinks and cigars were free.

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

Illegal drag racing two stories beneath Chicago’s streets.

FDR's Art Deco hospital tower was hopelessly inefficient.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.