The Moorish Castle, also known as Sintra Castle, is a fortification built in the 10th century, after the Muslim conquest of the Iberian Peninsula, and expanded after the Christian conquest. Like the other major attractions, the Castle of the Moors (or Castelo dos Mouros) is located high up on the Sintra Mountains and can be reached easily on the local bus. Anyone feeling like some exercise can also hike up, but be aware it’s no leisurely stroll! Constructed in the 9th century, the stone castle was a fortification that was built and used by the Moors who once occupied much of Portugal. Afterwards, the castle was ruined due to natural disasters but restoration projects have sought to maintain the main structure since the 1800s.