Land of pirates
You are facing the Masos del Corts, specifically between Mas Feliu (Can Baix), to the right, and Mas Torreportes (Can Noguera), to the left. Both have defence towers with a round floorplan attached.
“These farmhouses had to be fortified from the seventeenth century as defence from attacks by pirates and Berbers from as far away as north Africa or from the Medes Islands closer to hand, and who would make forays or incursions, and take prisoners as slaves or to charge a ransom, or take anything they could carry.”
The tower’s purpose was to make it possible to hold out for a while until reinforcements arrived, summoned with cries of “moros a la costa” (Moors ahoy).