Kalnik Castle is a historic fortress located in Croatia, near the town of Kalnik. Built in the 12th century, it served as a strategic military stronghold and residence for various noble families throughout its history. The castle is perched on a hill, offering stunning views of the surrounding landscape. Today, the ruins of Kalnik Castle attract visitors interested in history and architecture. The site features remnants of walls, towers, and other structures, showcasing the medieval design. It is a popular destination for hiking and exploring the natural beauty of the Kalnik region.