San Vigilio Castle is a historic fortress located on a hill overlooking the city of Bergamo, Italy. Built in the 10th century, it served as a strategic military outpost and offers stunning panoramic views of the surrounding landscape. The castle features well-preserved walls and towers, showcasing medieval architecture. Visitors can access the castle via a scenic funicular ride from the city. Inside, there are remnants of ancient structures and a small museum that highlights the castle's history. The site is a popular destination for tourists and locals alike, providing a glimpse into Bergamo's rich past.