127. Stationary steam engine
Sightseeing in Sydney picture - This is one of the world's most valued treasures, and other museums have offered the Powerhouse Museum billions of dollars for it. This is one of the world's earliest stationary steam engines, circa 1817. It is three storeys high, and is steamed several times a day, usually by very elderly volunteers. Despite its massive size, it produces less power than a lawn mower.