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

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

Go take a picture with the inventor of the daguerreotype photographic process.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

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

A historic ruin just 20 feet away from a busy highway onramp.

This poor little statue is the most vandalized memorial in Washington.

The span is crooked and made from two older recycled bridges.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A clone of a cloned tree that was so important it allegedly had its own guards.

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

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

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

This lovely pocket park is one of the most under appreciated in D.C.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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

The most accurate timepiece in the world.

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

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

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.