Marcos y Cordero Nature · San Andrés y Sauces, La Palma, Santa Cruz de Tenerife A hiking route that follows the water springs of the same name through a system of thirteen tunnels cut into the rock, considered one of the most visually striking on La Palma. Photo: Falk2 (CC BY-SA 4.0) What to see and do in San Andrés y Sauces