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

A unique columnar residence built in the 19th century.

Friction between grains of sand cause a curious "singing" sound.

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

Ice cream stand, snack bar, and time capsule of milk conveyance.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

This supermarket is suspended 25 feet above an interstate highway.

This hidden labyrinth offers walkers some brief peace of mind.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

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

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

This modern medieval weapon of war was built to toss pumpkins.

Beautiful natural falls where Satan once ruined a pot of beans.

The world's largest piece of copyrighted artwork.

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

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

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

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

No one really knows how these old hobby horses got here, but the herd keeps growing.

An 80-year-old house built out of newspapers.

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

Impossibly life-like natural history models created out of glass by a father and son.