I visited the Tower of London in June 2013. Contrary to all the other WHS in London during my visit, the Tower of London was packed with tourists and very long queues to enter (even on rainy days). I really liked the contrast of old and new (with the Gerkin behind and the Shard in front). The crown jewels were the main attraction on the inside but other than that I thought the hefty entrance fee could be avoided. I enjoyed spectacular panorama views of the White Tower and the Tower of London in general from The View on the Shard.