Narrowest house in Boston.

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

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

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Three prestigious academic collections come together to create a world-class natural history museum.

Over 50 whirling pools left behind from the glacial age.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

An eccentric inventor's castle home with its own indoor weather system.

Two thousand artifacts from around the world collected by one woman who loved to travel.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An enormous, inside-out glass globe built in 1935.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

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 home, museum, and death site of Kodak's influential founder.

The biggest museum dedicated to insects in North America, one of the largest in the world.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

Budapest's Communist-era statues, banished to the suburbs.

Museum dedicated to the terror regimes of Hungary.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.