Founded by William the Conqueror in 1066-7 and enlarged and modified by successive sovereigns, the Tower of London is one of the world's most famous and spectacular fortresses.
HM Tower of London
London
EC3N
http://www.historicroyalpalaces.org/webcode/content.asp?ID=34
March 1 to October 31, Tuesday to Saturday, 9am-6pm. Sunday to Monday, 10am-6pm. November 1 to February 28, Tuesday to Saturday, 9am-5pm. Sunday to Monday, 10am-5pm
Adults £15; children £9.50; senior £12; family £43