This fortress was founded in the 10th century when the Moors occupied the Iberian Peninsula. The Moors lived within the castle walls till 1147, when Sintra was seized by the Christian forces and handed over to Afonso Henriques, the first King of Portugal. The castle walls which are reminiscent of a giant dragon tail run up and down the hills and steep cliffs. Go there to enjoy unique views of Sintra, the iconic Palace of Pena and the Atlantic Ocean far away in the distance.