The oldest house in Washington, D.C. wasn't originally constructed in the nation's capital.

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

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

The district's only illusionarium supports free writing programs for local students with every purchase.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

There’s a special club house at the top for the bell ringers.

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

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

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

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

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

Where the U.S. government kept its actual treasure, before Fort Knox.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

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

Obscure Freemasons still live in D.C.’s largest private residence.

A haunting tribute to pioneering photographer Clover Adams.

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