Antiques and recycled art surround this cabin designed to resemble a 19th-century schoolhouse.

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

A miniature golf course crafted inside the world's largest simulated cave.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

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

A field of nothing but boulders which resembles a giant's gravel driveway.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

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

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

This park contains a number of standing stones meant to heal and inspire.

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

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A park full of outsider art, created by college students studying outsider art.

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

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

A beautiful oddities shop crammed with strange and morbid curiosities.

An abandoned stretch of highway, deteriorating next to the operational one.

World's first "penitentiary," meant to be humane, drove men insane.

Abandoned concert venue legendary for its rock counterculture.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This abandoned amusement park was built on a site with a dark history.

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