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

A historic neighborhood church is reborn as a psychedelic arts collective.

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

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

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

The final residence of an educator, civil rights leader, and presidential advisor was also the first headquarters of the National Council of Negro Women.

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

The first memorial dedicated solely to the Black troops who fought for the Union.

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

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

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

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The most accurate timepiece in the world.

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

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

When it comes to handsignals (and colonialism) rock always beats scissors.

This one-room cabin where the young colonel slept during the French and Indian War.

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

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.