Bolu Castle is a historic fortress located in the city of Bolu, Turkey. It is situated on a hilltop, offering panoramic views of the surrounding landscape. The castle dates back to the Byzantine period and has undergone various renovations over the centuries, reflecting different architectural styles. The castle's strategic position made it an important military site throughout history. Visitors can explore its ancient walls and towers, which provide insight into the region's past. Today, Bolu Castle is a popular tourist attraction, drawing history enthusiasts and nature lovers alike.