Perched high on the Marfa Ridge, the Red Tower, or St. Agatha's Tower, is a nice landmark with its bold, crimson walls standing out against the blue sky. For a small fee of 2.50€, you can step inside this 17th-century watchtower, but the real beauty is the rooftop. From here, you'll get some of the most incredible 360-degree views across the sea to the islands of Gozo and Comino. There's a car park nearby, but if you're taking the bus, be prepared for a steady 10 to 15-minute uphill walk to reach the entrance – a small effort for such a magnificent reward.