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

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

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

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

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

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

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

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

Parking garage where Bob Woodward met Watergate source "Deep Throat."

The national park was once a plantation estate.

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

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

An abandoned warehouse turned art sanctuary in New Orleans.

A calm and comfortable place to hang out with cats and kittens up for adoption.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A house of courtship where the Jazz Age's most storied lovers got their start.

A little piece of Paris in the sultry south of the U.S.

The beautiful, fruit-covered facade hints at this building's former life.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.