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

A building shaped like the Army Corps of Engineers logo, because why not?

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The national park was once a plantation estate.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

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

FDR's Art Deco hospital tower was hopelessly inefficient.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The only working large-scale tea plantation in the United States.

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

A celebrity from the late Cretaceous period.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

Right next to departures—how convenient!

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Go take a picture with the inventor of the daguerreotype photographic process.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

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

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The whole world in one water tank.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.