Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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

World's first "penitentiary," meant to be humane, drove men insane.

Mysterious rocks that ring musically when struck.

This colonial mansion has been home to a staggering number of American historic figures.

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

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

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

A glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

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

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

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

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.

A museum of anything and everything Stooge.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

Wedged between two sets of row houses is an awkwardly located family graveyard.