America's greatest forgotten garden and the former stomping grounds of Son of Sam.

At this farm in upstate New York, the former president plotted his reelection campaign.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

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

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

This giant disembodied horse head seems to balance impossibly on its nose.

A glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

The oldest surviving botanic garden in the United States.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.