A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

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

A quirky collection of outsider art made from automobile parts.

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

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

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.

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

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

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

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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

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

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

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

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.

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

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

Pennsylvania's own Roswell-style UFO mystery.

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

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

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