#TowerBridge’s engineering brilliance lies in its revolutionary #BasculeSystem. Once powered by steam & converted to electro-hydraulics in 1976, the drawbridge it lifts weighs over 1K tons each. Street-level walkways are 42m above water & spans 244m across the #RiverThames, its suspension & cantilever construction handles 40K daily crossings. London's #MostPhotographedLandmark
In Source: Tower Bridge
