Built in 1076 on the foundations of the Roman Temple of Claudius, England’s largest surviving Norman keep is bigger than the White Tower in London. Over the centuries it’s been a royal residence, a prison and home to the Witchfinder General. Among the treasures inside, look out for the Roman-era Colchester Vase, decorated with scenes of hunting and gladiatorial combat, and the Fenwick Treasure, a horde of Roman jewels hidden during Boudica's siege.
Ask if guided tours onto the castle roof have resumed.
