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!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This dramatic rail curve was once the target of a failed Nazi attack.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.