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

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

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.

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

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

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

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

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.

A field of nothing but boulders which resembles a giant's gravel driveway.

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

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.

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.

This elaborate towering structure was once famed for its revolutionary height.

This public space is speckled with the eerie remnants of a defunct amusement park.

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

America's first serial killer rests in anonymity.

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."