This was one my more memorable stops on the tourist circuit in London. Provide at least 3 hours (either a full morning or afternoon) to do this site. Besides all the history there (beheadings, the Tower, The Chapel, The Castle, etc., etc. {Take the Guided Tour!!}) you'll be touring a bona fide medieval castle built on an original Roman fort dating to the 60 AD. Also, the Crown Jewels are housed there. An amazing slice of history!
Buckingham Palace, The National Gallery near the Picadilly Circus is neat, Big Ben and the Houses of Parliament......
If I were to buy something on a trip there I'd get some domestically made sweaters (Shetland Wool?).
One thing I haven't seen yet.........Stonehenge!
I have had a couple of people say tower of london- we'll have to check it out! And sweaters-hmm christmas might be taken care of early this year! Thanks for the great input!