by Sarah Klein. So-called superfoods are nutritional powerhouses that help build bones, prevent chronic diseases, improve your eyesight, and even keep your mind sharp.
Tower Bridge is a combined bascule and suspension bridge in London, England over the River Thames. It is close to the Tower of London, which gives it its name.ower Bridge is still a busy and vital crossing of the Thames: it is crossed by over 40,000 people (motorists and pedestrians) every day. The bridge is on the London Inner Ring Road, and (as of 2007) is on the eastern boundary of the London congestion charge]] zone.
Conceived in 1884, construction of the tower began in 1887 and involved some 50 engineers, 100 iron workers, and 121 construction workers. It was completed on March 31, 1889, at a cost of 7,800,000 French gold francs. The main structure of the tower is composed of wrought-iron, coated (at present) with bronze paint. It is 324 metres (1,063 ft) in height, weighs a total of 10,000 tonnes (73 percent wrought-iron), and for 41 years it remained the tallest man-made structure in the world, until superceded by New York's Chrysler Building, designed by William van Alen (1883-1954), in 1930.