Malta has numerous towers spread across the islands, most of which where built by the order of St. John during their stay in Malta. Some of these towers where then modified by the English to be better suited for battle.
In their essence these towers where primarily used to detect enemies approaching by see and raising a signal using a fire to towers nearby, till the signal goes around the island, thus giving ample time for preparation of defenses till the enemy troops make it to port.
Through the map one can notice how these are spread out and in addition to the fortifications cover the whole of the maltese islands. Below find a complete list of towers.