This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

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

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

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

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

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

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

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

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

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

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

A historic neighborhood church is reborn as a psychedelic arts collective.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

Now a living classroom, this house was once the home of Reverend James Clinton Dent, a formerly enslaved man and a pastor.