Didn't research this at all before going in. You c...

Didn't research this at all before going in. You can walk the castle yourself or go with a guide on the half hour. Tons of great history here, really felt the energy of walking through a castle where so much has happened. Great views of the Tower Bridge from here as well. This was one of my top highlights of London, takes a couple hours to do it, you won't regret it at all.