Accessible only by boat, this centuries-old island fort never saw troops or combat.

A peaceful international sculpture garden in upstate New York.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

This rocky spread has been squeezed up directly from the bowels of the earth.

After giving up Michelin glamour for his Amish faith, one chef now makes stellar sausages in a small, off-the-grid shop.

This eclectic natural history collection holds everything from a bit of the trans-atlantic cable to Hemingway's marlin.

Floor-to-ceiling frescoes by local art students cover the interior of a nearly 200-year-old church.

This quirky museum celebrates the history of a local cod fishing industry.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A legendary boxing venue and ring featured in Rocky V.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

The abandoned coal loading dock is a canvas for unsanctioned art.

Dr Barnes' $25 billion private collection of art and arboretum.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

The oldest surviving botanic garden in the United States.

Where America's first doomsday cult awaited the end of the world.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A layered tribute to the work of mosaicist Isaiah Zagar.

This small Newfoundland town has declared itself the “Root Cellar Capital of the World.”