The world's oldest soul food restaurant is also one of its best.

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

It was once the base for a series of domestic terror attacks.

The historic home of an educator, abolitionist, activist, and poet.

An overlooked tribute to one of the most important peace deals in American history.

A line of blue paint marks the route of the inaugural parade.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

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

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

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

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

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

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The towering figures were created from the cemetery's fallen old-growth trees.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

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

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

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

The national park was once a plantation estate.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.