The Imperial War Museum was an old lunatic asylum once housing Charlie Chaplins mother, before the hospital itself moved to Beckenham in 1930. This superb building was turned into the Imperial War Museum. The museum now hosts many artefacts including an extensive array of guns, tanks and fighter planes from both the World Wars and also of the Gulf war. There is also a permanent Holocaust exhibition on display which chronicles the systematic attempt that was made to murder the Jews of Europe. Admission is free.