Boat dive in Comino area not far from the Blue Lagoon. Enter water at a depth of 2-3 metres, then proceed to swim through two arches going down to around 9 meters. This is a great cave carved out by the wave action, with a sandy bottom and smooth sides. Upon reaching the cave, go straight in and take your left turn. When entering the cave swim 15m into gloomy recess, so a torch is recommended. There is a chimney at the back of the cave and amaximum of 5 divers can surface to a natural lightcoming through the small cracks in the rock.
Lot of nooks and crannies to look for hidden marine life. Lobster have been known to hang around inside the cave.