An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

An unusual assortment of steerable wooden sleds is on display in a library in New Jersey where they were first invented.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

The Decoy Capital of the World.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

A Civil War Museum with some notable medical antiques.

A priceless collection of the Nation's cryptologic history.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This old mill and former police station now present a world-class collection of Orthodox iconography.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

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

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

The site of Paul Revere's historic two lantern warning.

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