There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

At 207 feet, one of the world's longest continuous escalators.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Home to items never before seen by the public.

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

The district's only illusionarium supports free writing programs for local students with every purchase.

The national park was once a plantation estate.

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

When it comes to handsignals (and colonialism) rock always beats scissors.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

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

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.