Visible from afar is the mighty fort, rebuilt in the 13th century by King Dinis. From there you have a magnificent view over the wide plains of the Alentejo with its cornfields and gnarled olive trees. During a tour of the city, you can easily orientate yourself by the imposing, almost 40 meter high tower of the fort, the "Torre de Menagem". Also worth seeing is the church "Santa Amaro" near the fort, which dates back to the 6th century and is one of the oldest preserved buildings in Portugal.