The Spanish archipelago of the Canary Islands has historically had a great strategic importance that led to fortifying them to avoid possible invasions.
The most recent fortifications were built in two phases: one at the end of the 19th century, in order to prevent an American invasion during the Cuban War, and the other during World War II, to prevent the allies from taking over the islands (the British, in fact, raised a possible occupation of the archipelago, known as Operation Pilgrim, which was ultimately not carried out).
During World War II, dozens of forts and bunkers were built on the island of Fuerteventura. This cache will show you one of them located in the dunes of Corralejo. You can find other bunker caches on the east coast in Puerto Lajas: BUNKER 1 & BUNKER 2
NW from Corralejo you can also visit Batería de Costa de Corralejo. The Corralejo Battery, equipped with Ordóñez 150 mm cannons and two Skoda 76.2 mm cannons, was located in the extreme north of the island and construction began in 1941. Another of the positions were the Matas Blancas Battery, located next to the battery of the same name, in the south of the island, and was equipped with 152.4 mm Russian cannons.
Credits: [1]