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

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over fifty whirling pools left by the glacial age.

A stunning garden filled with fantastical environmental folk art and sculptures.

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

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

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

A historic bridge with a lovely acoustic anomaly.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

A cave dug by a man directed by ghosts to find pirate treasure.

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

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

This dam in the woods, built by Henry Ford with only manpower and oxen, holds no water and serves no purpose.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

This hidden labyrinth offers walkers some brief peace of mind.