One of the oldest of its kind.

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

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

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

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

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

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

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

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

A quirky collection of outsider art made from automobile parts.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Steepest flood safety railway in the entire world.

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

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

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

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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

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

A glittering Thai Buddhist temple in suburban Pennsylvania.