The Green Caves

Cueva de los Verdes is a lava tube and tourist attraction of the Haria municipality on the island of Lanzarote in the Canary Islands. The cave lies within the Monumento Natural del Malpaís de La Corona, a protected area of the Canary Islands.The cave was created around 3,000 years ago by lava flows erupting from the nearby volcano Monte Corona, flowing across the Malpaís de la Corona toward the sea. As in all lava tubes, the top of a lava stream cooled and developed a solid crust, and the lava stream later drained away leaving the top crust as the roof of a cave.