Viaducto de Los Tilos Monument · San Andrés y Sauces, La Palma, Santa Cruz de Tenerife Opened in December 2004, it is the largest single-arch bridge in Spain, 350 metres long and more than 150 metres above the Barranco del Agua. diciembre de 2004 Photo: Luis martin-tereso at English Wikipedia (CC BY-SA 3.0) What to see and do in San Andrés y Sauces