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

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 glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

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

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

This secluded walking trail is a hidden gem of a Pittsburgh park.

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

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

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

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

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

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

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

An outlandish shoe shaped house built by an eccentric millionaire.

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

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

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

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

The oldest farmer's market in America is so ancient it was approved by the King of England.