Priceless space junk on display in front of a local Dairy Queen.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Yo, Adrian!

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

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

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

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

Steepest flood safety railway in the entire world.

The site of the climactic scene from the classic horror film is now a historic landmark.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Oldest existing wire suspension bridge in the United States.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?