Castello Orsini is a historic castle located in the town of Nemi, Italy. Built in the 15th century, it served as a stronghold for the Orsini family, a powerful noble family in the region. The castle features impressive stone walls and towers, reflecting the architectural style of its time. Today, Castello Orsini is a popular tourist attraction, offering stunning views of the surrounding landscape, including Lake Nemi. Visitors can explore its ruins and learn about the castle's rich history, making it a significant site for those interested in medieval architecture and Italian heritage.