One cannot miss a visit to the three cities of Vittoriosa, Cospicua and Senglea and not visit the Fort St Angelo at the tip of Vittoriosa. While you there visit Malta at War Museum, which is an Air Raid Shelter built by the Maltese at the Old Entrance Gate of Vittoriosa, Couvre Porte. You can watch a 20 min film about  the Great Siege during the Second World War and experience a 1Km long air raid shelter! There is also free transport from this site to Fort Rinella in Kalkara. It's a Victorian Fort with the biggest 100ton Gun built by Lord Armstrong. One can watch Victorian Soldiers with a live re-enactment show everyday at 230pm. There's a cafeteria with light snacks and souvenir shop.