The Castle of San Andrés or Tower of San Andrés is located in the village of San Andrés. This castle served to protect the island of Tenerife from pirate attacks.
Wikipedia https://en.wikipedia.org/wiki/Castle_of_San_Andrés
Address 27 Calle Trinquete, San Andrés 38120, Spain
Coordinates 28°30'17.486" N -16°11'27.162" E