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.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.