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

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

The FBI's urban training course may have the highest fake crime rate in the world.

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

FDR's Art Deco hospital tower was hopelessly inefficient.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

An astounding collection of medical specimens, including bits of President Lincoln.

A humble ode to the heroic air rescue efforts of the United States Coast Guard serving on the Great Lakes.

A comedy troupe's collection of bizarre humor.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This shallow cave got its name from copious amount of human bones found inside.

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

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

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.