洞穴潜水，地点： Spain

Spain's best-documented cave dives fall into two groups. On Mallorca, coastal limestone hosts anchialine caves (flooded caves with layered fresh and salt water connected to the sea underground), including the Gleda–Camp des Pou system, one of the longest underwater caves on the island. On the mainland, karst resurgences such as the Pozo Azul in Burgos lead into long chains of sumps explored by Spanish and British expeditions.

如何进入

Many Mallorcan caves lie on private land or in protected habitat, and research and exploration dives in the Gleda system have depended on permits from the Balearic government's environment department; these were refused for more than three years from late 2015. On the mainland, no published permit regime was found for the Pozo Azul in the sources consulted. A Portocolom provider that guides cave dives states that it must request a permit for every dive.

综合概览，各潜点页面提供各自的出入信息及对应日期。