Monterrei Castle is a historic fortress located in the province of Ourense, Spain. It was built in the 12th century and served as a strategic military stronghold. The castle features impressive stone walls, towers, and a well-preserved keep, showcasing the architectural style of the time. The castle is situated on a hill, offering panoramic views of the surrounding landscape. It has undergone various renovations over the centuries and is now a popular tourist attraction. Visitors can explore its grounds and learn about its rich history, including its role in the Reconquista and local conflicts.