Nis Fortress is a historic fortification located in the city of Nis, Serbia. Built in the 18th century, it showcases a blend of architectural styles, including Ottoman and Austrian influences. The fortress is strategically positioned on a hill overlooking the Nisava River, making it an important military site throughout history. Today, Nis Fortress is a popular tourist attraction, featuring well-preserved walls, towers, and gates. Visitors can explore its expansive grounds, which include a park and several museums. The fortress also hosts cultural events and festivals, highlighting its significance in Serbian heritage.