A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

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

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

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

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

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

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

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Art deco landmark on the outskirts of Washington, D.C.

A haunting tribute to pioneering photographer Clover Adams.

The rogue roots are gradually consuming some of the historic marble grave markers.

This forgotten boat elevator was an engineering marvel in its heyday.