Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

What happens when you cross a mayor and a painter?

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

This beautifully preserved Ottoman house is steeped in history.

Gigantic water vessel, permanently grounded in Southern Albania.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

The last remaining building in Washington, D.C., built by H.H. Richardson, one of America's most iconic architects.

Mysterious installations bring levity and light to a sometimes stodgy city.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

Over the last century, this elegant columned facade has been home to the headquarters of a bank, several nightclubs, and a restaurant.

This small hilltop church weaves the urban history of Washington, D.C. with the national history of the United States.

Where you can hail your favorite fictional commanders-in-chief.

A brass and marble scale model of the solar system embedded in the concrete.

This house was once the location of Frelinghuysen University.

An 18th-century townhouse that once hosted guests of the president.

The hippo that stands on this university campus was once a drunken flea market purchase.

In this town's main square resides a statue of none other than the 43rd President of the United States.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.