The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

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

The bears may be gone, but their old cages can still be found.

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

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

A steampunk wonderland that preserves America's history of industrial innovation.

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

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

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

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

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.

Even Henry David Thoreau found this glacial pothole irresistible.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This supermarket is suspended 25 feet above an interstate highway.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The world’s largest concentrated solar plant generates as many problems as megawatts.