The London Pass is a sightseeing card which gives holders free entry to over 60 sights and tourist attractions in London. Customers simply pay the once off price for the London Pass of their choice and then can enter as many of the tourist attractions included on the pass that they wish to, without paying. Some of the most popular attractions which can be visited free with the London Pass are the Tower of London, Kensington Palace, Windsor Castle, London Zoo – to name but a few.