One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

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

A replica of the famous memorial statue at the Normandy American Cemetery hides in an office building in downtown D.C.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

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

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

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

This unassuming passageway played a key role in one of the most important events in U.S. history.

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

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

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

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

The world's oldest soul food restaurant is also one of its best.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

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

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