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

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

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

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

This forgotten boat elevator was an engineering marvel in its heyday.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

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

Perhaps the most scandalous statue of America's first president.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

One of the oldest of its kind.

A vintage video game wonderland in downtown Reykjavik.

Art deco landmark on the outskirts of Washington, D.C.

The filming location of a shark attack in Steven Spielberg’s famous shark movie.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

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

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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.