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

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

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

There’s a hidden military meme engraved on the World War II Memorial.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Home to items never before seen by the public.

An overlooked memorial honoring the local Washington residents who died in World War I.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

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

These unusual rooms on wheels are holdovers from the 1960s.

A decaying garage hidden amid the dense forest is all that remains of a once-prosperous dairy farm.

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

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

The oldest continuously operating fish market in the United States.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

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

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.