The Castle of Beja crowns the old town and is one of the most striking medieval fortifications in the Alentejo. The walls and towers were largely rebuilt in the 13th and 14th centuries on Roman and possibly earlier Moorish foundations. The Torre de Menagem — the tall keep — is the most visible feature of the Beja skyline from across the surrounding plain, and you can climb it for a panoramic view stretching to the horizon in every direction.
The interior of the castle grounds is largely open public space, but the tower itself has been converted into a small display space about the castle's history. The walls are walkable in sections and give a good sense of how effectively the castle commanded the surrounding countryside. Access is straightforward — the castle is in the heart of the old town, a short walk from the museum.