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

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

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

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

A glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

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

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

A daily replay of the experiment that proved the rotation of the Earth.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

This jail which was in service for over a century is now open for curious visitors.

Once on display alongside a giant Gumby, it’s as tall as a nine-story building when fully extended.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

Pennsylvania's own Roswell-style UFO mystery.

An outlandish shoe shaped house built by an eccentric millionaire.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

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

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