At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

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

The only Leonardo Da Vinci painting in the Western Hemisphere.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Perhaps the most scandalous statue of America's first president.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

A nostalgic bibliographic gem.

The oldest continuously operating fish market in the United States.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Home to items never before seen by the public.

Home of the International Space Hall of Fame.

A controversial magical figure is hidden within a diorama of the city.

Here be dragons.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

This impressive scene portrays the elusive forest giraffe of Central Africa.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

One of the most dazzling dioramas at the American Museum of Natural History is also one of the oldest.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.