This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

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

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

A giant ball made from pieces of an old Jeep.

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

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

Pittsburgh's literal underground railroad.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A retrofuturistic art installation in the Pittsburgh Airport.

Hundreds of protractors affixed to surfaces all over the city.

An Irish Memorial commemorating those who perished due to potato blight.

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

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

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

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

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

America's first serial killer rests in anonymity.

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

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

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

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

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

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

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