Crown jewels, crossbows and cr...ravens. William the Conqueror built this fortress as his royal residence in 1078. The main activities that went on here though were imprisoning, torture and execution, and was even used as a POW prison in WWII. It is a top London attraction including a weaponry museum, Traitors gate and of course the Beefeaters and the ever present ravens. Open 9am-6pm Tue-Sat, 10am-6pm Sun-Mon (Mar-Oct), 9am-5pm Tue-Sat, 10am-5pm Sun-Mon (Nov-Feb). Admission £16, Adult, £13 Student.