Isla Descubridor Sur is a boat-accessed rocky-islet dive off the south side of Cabo de la Nao, near Granadella. The profile starts shallow, rolls onto a steep wall, and includes a small cave and porthole opening in the rock, so the dive rewards slow scanning and good buoyancy more than a fast tour. It is best for advanced divers who want a compact, structure-rich Mediterranean dive with barracuda schools and plenty of smaller life on the wall. The approach is almost impossible from land, so it works as a deliberate sea-entry plan rather than a casual shoreline outing.