This nine-story building is the oldest standing skyscraper in D.C.

Beneath unsuspecting visitors feet, a capsule containing pieces of America’s civil rights history.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The National Park Service’s best-kept secret with views that rival any in D.C.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

This statue of the "father of television" stands prominently in the United States Capitol.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

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

In an alcove of this historic library, you can find murals painted in the 1930s by an artist who went on to create some of Disney's most iconic animated films.

Dedicated to the man who created the first radio wave communication system.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

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

This giant, rotating globe was built to celebrate the expansion of a company that makes steam cleaners and pressure washers.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

The only presidential monument to display a late POTUS's actual casket.

A jukebox headstone marks the grave of the Cleveland disc jockey credited with coining the term “rock 'n' roll."

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.