The first purpose-built art gallery in the United States is once again open as a center of craft arts.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

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

The most decorated dog of World War I is preserved in the Smithsonian.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

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

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

The national park was once a plantation estate.

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

The rogue roots are gradually consuming some of the historic marble grave markers.

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

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

This unique historical monument features large concrete spheres designed to resemble fallen stars.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.