Blue Hole (Dwejra)

Steps carved into pale limestone lead down from the car park to a pool the colour of stained glass. That's the Blue Hole itself: a vertical shaft open to the sky, sheltered and still, before the real dive even starts. Divers descend inside the shaft's walls, and somewhere between 6 and 15 metres the rock opens into a natural window onto the open Mediterranean. Swimming through it feels like leaving one dive and starting another. The enclosed calm of the shaft gives way to a sheer wall dropping past 25 metres, with room to go deeper for those with the training. Golden cup coral dusts the underside of the arch, catching whatever light filters down from above; it is the single most photographed moment of the dive. From the wall, divers typically turn seaward toward the boulder field left by the collapsed Azure Window, or follow the rock the other way to a sloping fissure that regains shallow water near 7 metres. Divers who arrive from the Inland Sea side often finish here instead, using the arch as the exit: a stop at depth on the wall, then a slow rise into the shaft to surface exactly where someone else's dive began.

Very few Gozo sites let you cross from open sky to open sea before the dive plan even begins. The shaft-and-arch entry does exactly that, and it means a single shore entry reaches three distinct experiences: the pool and chimney, the open wall beyond, and the boulder field of the collapsed Azure Window, all without a boat. That last piece is what separates this site from a generic Mediterranean wall dive. The Blue Hole sits directly beside the spot where the Azure Window once rose, an arch that came down in a March 2017 storm; divers who remember the old surface landmark now swim past its remains on the way to or from the shaft. This is not the Blue Hole known from the Red Sea. The two share only a name; Gozo's version is a Mediterranean shaft-and-wall dive on a different coast entirely, and one nobody doing a Gozo trip tends to skip.

The walk down is short but rough. Carved steps ease the descent, though the coralline limestone underfoot is uneven enough that sturdy shoes are worth packing apart from your dive fins. A torch matters more than it looks like it will, since light drops off fast at the base of the shaft and the golden cup coral only shows its colour with help. Current through the arch itself can pick up; plan your return leg to swim with it rather than against it. Malta's national rule applies here directly: independent diving below 30 metres certification requires a licensed instructor, which matters given the wall continues well past that depth.1 All of Dwejra is protected habitat under Natura 2000, so taking anything, shell, rock or marine life, is off the table. Check the swell before you travel. Northwesterly or southwesterly weather above roughly a metre can turn the shore entry dangerous, sometimes impossible, since there is no alternative entry point once conditions turn.