Kalnik is a mountain located in Croatia, specifically in the region of Slavonia. It is part of the Croatian Zagorje and is known for its picturesque landscapes and diverse flora and fauna. The mountain reaches an elevation of 643 meters, making it a popular destination for hiking and outdoor activities. The area around Kalnik is rich in history, with remnants of ancient fortifications and churches. The Kalnik Castle, a historical site, adds to the cultural significance of the region. Visitors can enjoy scenic views, explore nature trails, and learn about the local heritage while experiencing the beauty of this mountain.