Large one-man sculpture park in Michigan.

"The Most Boring Road in the State."

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Deep scars on the earth left by the Ice Age.

The only presidential monument to display a late POTUS's actual casket.

This massive airship factory is so large that it has its own indoor weather.

Why have you never heard of the second most popular tourist site in New York?

An upstate New York garage advertises its services by literally putting the automobile above all else.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

The building that inspired Shirley Jackson's "The Haunting of Hill House."

This landmark cemetery in Boston was created more than 300 years ago.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

Narrowest house in Boston.

Tragedy on Little Brewster Island memorialized.

Historic Hull Street was actually the first street with a proper name in the Boston area.

A mysterious stone embedded at the base of a historic Boston building.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Exact replica of the ancient monument, but much, much lighter.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.