The Castle lies on a peninsula jutting out into Lake Como close to Riva Bianca and its namesake beach. Built in the Romanesque period, the fortress was at the focus of several historical events, like the battle between Milan and Como in 1124. It was also long time home to Teodilinda, Queen of the Lombards. Inside the castle is the village and the Church of Saints Maurizio and Lazarro with frescoes of the 14th century. The village of is very characteristic, with square and narrow streets and can be visited as a stage of the Path of the Lierna-Varenna Wanderer.