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

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

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

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

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

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

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

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

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.

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

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

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

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

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

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

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

Pennsylvania's own Roswell-style UFO mystery.

An outlandish shoe shaped house built by an eccentric millionaire.

These disused steel furnaces are now haunting ruins that may one day be a national park.

The Home and murder site of the witch of Rehmeyers Hollow.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

America's first serial killer rests in anonymity.