Fodor's Expert Review Cueva de los Verdes
Costa Teguise
Cave
Guided walks take you through this 1-km (½-mile) section of an underground lava tube, said to be the longest in the world. Deep in the volcanic area of Malpaís, it's one of the most stunning natural sights on the island. The entrance is just north of Costa Teguise, beyond Punta Mujeres.
