The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

A line of blue paint marks the route of the inaugural parade.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

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

The angel of death appears to weep black tears at this grave marker.

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

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

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A bronze monument to Cleveland's favorite, fastest son.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

A real flying saucer, contracted by the U.S. Air Force.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A headstone tells the sad story of a lost little boy and his pet dog.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.