https://www.thebrigadegranada.info/ . Most divers heading to Spain flock to the Canary Islands or the Costa Brava, but the Costa Tropical—located on the coastline just south of Granada—offers some of the most fascinating historical dives in the Mediterranean. Between La Herradura and Almuñécar, the seafloor is scattered with the remnants of ancient merchant routes and centuries-old maritime defenses.