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

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

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

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

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

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

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 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.

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.

The "lovely red Vega" of the legendary record-settling pilot.

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

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Decades before the scandal, this staircase on the river was a literal "water gate."

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

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

An Industrial Revolution-era public work that purified water using nothing but sand.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The house where John Wilkes Booth conspired with his co-conspirators.