Guaita Fortress is one of the three towers located on the summit of Mount Titano in San Marino. Built in the 11th century, it served as a defensive structure to protect the small republic from invasions. The fortress features thick stone walls and offers stunning views of the surrounding landscape. Today, Guaita Fortress is a popular tourist attraction, drawing visitors who are interested in history and architecture. It is part of the Historic Centre of San Marino, a UNESCO World Heritage site, and provides insight into the medieval past of this independent microstate.