Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

Quite possibly the last cross all humans will ever see.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

These whimsical works of art tell the story of the city's past and present.

A former connection to City Island, it has been abandoned since the 1930s.

This uninhabited island in Maine is home to various works of art left by visitors over the years.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

250-year-old farm now features sculptures, a petting zoo and a hippy-bazaar.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

Where the author wrote her beloved "Little House" books.

The remains of a deserted 1800s farming community can be found in Little River State Park.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

Historical figures from New York City's Catholic community reside in Midtown.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

A museum dedicated exclusively to the lore and history of ouija boards.

A dollhouse full of taxidermy rodents, each one handcrafted and given a sordid past.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

The pleasant woodland cemetery that has inspired more than its fair share of wild legends.

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

Rumored to have tormented a family in the late 1960s, this toy now resides in a quiet little oddities shop.