Head straight to the 5th floor of this award-winning museum inside a replica 16th-century tower house for a view from the top. Then work your way down through the excellent Armada Shipwreck exhibition, and the Story of Derry, where well-thought-out exhibits and audiovisuals lead you through the city's history, from the founding of the monastery of St Colmcille (Columba) in the 6th century to the Battle of the Bogside in the late 1960s. Allow at least two hours.