Costa del Sol diving is a flexible local-operator experience rather than a liveaboard trip. Malaga is the airport and culture hub; Nerja is the relaxed beach base; La Herradura and Marina del Este are the strongest dive logistics cluster. The best underwater landscapes sit where the Sierra de Almijara drops into the Alboran Sea around Maro-Cerro Gordo, Punta de la Mona, La Herradura Bay, and rocky Marina del Este. Expect walls, swim-throughs, boulder reefs, Posidonia meadows, octopus, nudibranchs, morays, bream, salemas, cuttlefish, and occasional sunfish. Non-divers get caves, white villages, tapas, museums, hiking, and cove beaches. The critical rule is conservation: Maro-Cerro Gordo has no-dive zones, and autonomous scuba outside those zones needs prior protected-area authorization.