Mentioned by Destguides
40 Famous London Landmarks You Must See
"The White Tower, popularly known as the Tower of London, is definitely one of the must-see historical landmarks in London. It was constructed almost 1000 years ago in 1097, and this old monument has been used as an execution site, prison, and royal residence. The walls of the Tower of London are rich in history, making it one of the most-visited English landmarks in the city."