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

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

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

Journey through a collection of over 35,000 Halloween items from all generations.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

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

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

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

A giant ball made from pieces of an old Jeep.

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

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

Where the "World Pinball Champion” is crowned.

A retrofuturistic art installation in the Pittsburgh Airport.

The graffitied ruins stand hidden within the Pennsylvania woods.

This collection honors the iconic, and proudly American lighter that just won't quit.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

One of the oldest of its kind.

A glittering Thai Buddhist temple in suburban Pennsylvania.

Steepest flood safety railway in the entire world.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

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

The ruined remains of a coal mining ghost town are hidden within the woods.

It would take 35 firetrucks to fill this enormous glacial pothole.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.