Malta

The Blue Hole at Dwejra on Gozo island is a natural cylindrical hole in the limestone shelf, 10 m in diameter and 15 m deep, that opens through an arch at 8 m into the open Mediterranean. The arch drops to 25 m on the seaward side, connecting to the Azure Window collapse site and a dramatic wall leading to 50 m. The resident date mussels, dusky grouper, and dense moray eel population make it an outstanding Mediterranean dive.

Cirkewwa at Malta's northern tip is an excellent all-conditions training and recreational site built around the wreck of the P29 patrol boat, sunk in 2007, and an older car ferry resting at 18 m. Horse-shoe and arch formations in the limestone provide sheltered habitat for nudibranchs, cuttlefish, and octopus that are among the most photogenic in the Mediterranean. Calm water and easy shore access make it the most dived site on the island.

The Um El Faroud is a 110 m Libyan oil tanker sunk deliberately in 1998 as an artificial reef off Dallamara on Malta's south coast. The wreck lies on a 25–36 m sandy bottom with its superstructure accessible from 18 m, and is now colonised by large Mediterranean grouper, barracuda, and enormous spider crabs. Penetration of the engine room and cargo holds is possible for trained divers and the prop shaft makes for an iconic photographic subject.

Gozo Blue Hole Diving is located on the sister island of Gozo, a five-minute ferry ride from Malta, and centres its operation on the world-famous Azure Window site — where a collapsed limestone arch created a dramatic natural tunnel descending to 25 metres and opening onto an open ocean wall draped in pink sea fans and sponges. Their PADI and CMAS training programmes run from resort courses through to tec40, taking advantage of Gozo's sheltered Xlendi and Marsalforn bays for confined water training. The island's compact size and dense site concentration allow three or four dives to be comfortably completed in a half-day.

Malta Seahorse Divers is a long-established BSAC and PADI school based in St. Paul's Bay, exploring the Mediterranean's most celebrated diving destination — a limestone archipelago riddled with underwater caves, sea arches, blue holes, and deliberately sunk wrecks including the Zenobia and the Um El Faroud. The Mediterranean's excellent visibility and mild year-round temperatures make Malta ideal for technical and cavern diving, with resident short-snouted seahorses, moray eels, and octopus as reliable macro highlights. The school holds national records for the longest open-water training season in the central Mediterranean.