Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A nostalgic bibliographic gem.

The most accurate timepiece in the world.

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

This statue of the "father of television" stands prominently in the United States Capitol.

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

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

The site of the climactic scene from the classic horror film is now a historic landmark.

This poor little statue is the most vandalized memorial in Washington.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The oldest continuously operating fish market in the United States.

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

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

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

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

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

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

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