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

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

This piece of peacetime naval wreckage memorializes the tragic sinking of the USS Maine--an event which sparked the Spanish-American war.

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

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

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

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Shelves covered in dozens of coffee bean varieties fill this North End institution.

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

This parking garage was the site of what was - at the time - the largest cash robbery in history.

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

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

"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."

Hunt for buried treasure in Nova Scotia.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.