The term windmill derives from their use to mill grain. The first windmills appeared in Europe during the 12th century in northwestern France and southern England. At their peak of popularity some windmills were able to produce more than 1.5 megawatts of power, a level not reached again until 1988.
A tower designed to emit light for marking dangerous coastlines, hazardous shoals, hidden reefs and also to help guide ships into safe harbors. Often these towers are cylindrical in order to avoid damage from strong winds.
Located in Philadelphia, Pennsylvania, the Liberty Bell is an iconic symbol of American independence. Upon the bell read the words "Proclaim LIBERTY throughout all the land unto all the inhabitants thereof." It weighs 2,080 pounds and is suspended from what is believed to be its original yoke, made of American elm.
The first modern Ferris Wheel was designed and constructed by George Washington Ferris as a landmark for the 1893 Worlds Columbian Exposition in Chicago. The term Ferris wheel later came to be used generically for all such structures. As of 2012, the Singapore Flyer at 541 feet high is the world’s tallest wheel.