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

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

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

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

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

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

Mysterious rocks that ring musically when struck.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

A glittering Thai Buddhist temple in suburban Pennsylvania.

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

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

A surprising museum of 20th-century technology.

A unique sculpture park that specializes in the huge and bizarre.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.