The Jameos del Agua — like the Cueva de los Verdes — are part of a 6Km long lava tube which formed about 3,000 years ago when the Montaña La Corona erupted. Molten lava continued to flow as the surface hardened, which in turn led to the formation of the tubes, which run down under the Atlantic. The word Jameo is used in this context to refer to the large openings in the tube which formed when parts of the roof collapsed due to a pressure build up caused by the volcanic gases. It is these open-air caves which Manrique used as the centerpiece for the attraction and which have given it a name.