The Iron Bridge: The world's first iron bridge was opened in 1781 in Coalbrookdale, in a valley noted for its iron and ceramic industries. The area is now a World Heritage site, with seven museums celebrating the industry and life of those times. Buy a Passport, which entitles you to visit all the museums at any time of your choosing, saving over the cost of individual entrance charges.
http://en.wikipedia.org/wiki/Ironbridge