The soaring gondola lines form the longest aerial cable car system in the world.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

An ingenious solution to a tricky engineering problem, this spiraling bridge takes drivers for a dizzying spin.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

A giant roundabout made up of six smaller roundabouts can befuddle the uninitiated.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

Hundreds of protractors affixed to surfaces all over the city.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The last street in Pittsburgh that's paved with wood.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.

A 20-foot-tall quarter commemorates George Washington’s ties to Bedford County.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Made from local Irish moss, this pie is served only in Prince Edward Island's potato museum.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Once home to Komodo dragons, this island dreamscape has a rare combination of white, pink, and black sand beaches.

Once the path of a railway tunnel, now home to thousands of glowing insects.

What is it about mushrooms that makes people wish they lived inside of them?

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

This roadside wonder is as mysterious as it is beloved.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.