The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

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

This decommissioned surface-to-surface missile resides outside the American Legion Post in Pennslyvania.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

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.

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

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

Nothing says indulgence like a 1,500-pound chocolate castle.

A retrofuturistic art installation in the Pittsburgh Airport.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

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

For decades, it has disappeared and reappeared as water levels rise and fall.

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

These lush botanical gardens employ the most purrfect pest control force.

Locals call this magical moss-covered walkway the "Emerald Path."

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The abandoned coal loading dock is a canvas for unsanctioned art.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

This public space is speckled with the eerie remnants of a defunct amusement park.