A squat square fort with corner turrets, painted bright red against the white limestone of the surrounding garrigue, the Red Tower stands on the L-Aħrax plateau north-west of Mellieha. Inside there is a small exhibition on the Knights' coastal defences and you can climb to the roof for an unbeatable view: the whole sweep of the Comino channel, the bays of L-Aħrax, and on a clear day the cliffs of Gozo.
It is managed by Din l-Art Helwa, the Maltese national trust. Opening times are limited (mornings only, closed Sundays). Combine with a walk on to the cliffs at L-Aħrax tip and back along the shore via Slugs Bay.