This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

This dilapidated ship carcass covered in trees is a striking sight.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

A stairway to heaven, or to nowhere at all.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Outsider art meets paleontology at this roadside reptile repository.

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

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

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

At 207 feet, one of the world's longest continuous escalators.

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

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

The national park was once a plantation estate.

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

This lovely pocket park is one of the most under appreciated in D.C.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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

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

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.