One of the better heritage visits in Valletta if you want actual wartime infrastructure rather than just another pretty stone facade pretending to be enough. The site is open Monday to Saturday and publishes fixed guided-tour times, which makes it easier to plan than half the island.
Adult (16+) €20, Senior €19, Child (5–15) €7, Family €35; guided tours are also listed at €17 per person on the tickets page
