The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

This now-deactivated naval base defended the Florida coast for centuries.

A local landmark with generations of spraypainted messages, and more being added each day.

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

Trinkets and toys lovingly handmade by maximum security prisoners.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

This unassuming stone commemorates a condiment factory gone up in smoke.

This railroad tunnel was once the longest in Massachusetts.

A short walk through the woods will take you to an unusual flat hill top, used by the Shakers for outdoor worship.

Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

This historic mini-suspension bridge was swept away once but is now here to stay.

A tribute to the couples who brave long periods of separation during wartime.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

Where monkeys run wild and the humans are caged.

An abandoned water sports stadium that has become a haven for graffiti and decay.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

An underwater city for the dead.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

A mysterious collection of stones stand outside a small New England town.

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.