From tiny to towering, more than 1,100 species of cacti fill a former quarry at the Jardín de Cactus in the north of the island, a garden complex which owes its design to César Manrique. Nearby, the Jameos del Agua, which were formed by partially collapsed lava tubes, contain a swimming pool, restaurant and concert hall, also built by Manrique. The site is connected to the La Cueva de Los Verdes lava tunnels where islanders once hid from pirates.