The interior of the southern most mill. The three derelict windmills of Mosquera. The windmills stand on the Cerros Altos (Altos Hill) near the hamlet of Mosquera, Albufeira, Algarve, Portugal.. The windmills stand on the Cerros Altos (Altos Hill) near the hamlet of Mosquera, Albufeira, Algarve, Portugal.