Karlovac Fortress is a star-shaped fortification located in the city of Karlovac, Croatia. Built in the 16th century, it was designed to protect against Ottoman invasions. The fortress features thick walls and bastions, showcasing Renaissance military architecture. Today, Karlovac Fortress is a popular historical site, attracting visitors interested in its rich history and unique structure. The surrounding area includes parks and walking paths, making it a pleasant destination for both locals and tourists. The fortress stands as a testament to the city's strategic importance in the past.