Inventions

Bat house that has only ever housed bat for one night; they all flew away and never came back.

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

Large tower used for simulating radiation of Hiroshima bomb and the tallest object ever relocated.

Only spot in the world where an HVDC powerline, a single phase AC and a three phase AC powerline all meet.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Only place outside China and India where two overhead DC power lines cross.

Advice-columnist's bell tower, paid for with pennies.

World's largest magnetic research facility.

Thousands of turbines whir at the origin of North American wind power.

Genesis of modern hydroelectric power.

Museum covers every step of the chocolate-making process, from cultivation to the finished product.

Where the Monitor was launched and ushered in the age of the "ironclads."

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

Arcade chock-full of old timey, whimsical, hand-cranked automata and peepshows.

Cape Breton landmark filled with recognizable faces.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

Colorful collection of antique musical oddities.