A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

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

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

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

A glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

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.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

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

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.

This jail which was in service for over a century is now open for curious visitors.

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

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

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

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

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

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.

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