The City Walls of Dubrovnik are a series of fortifications that encircle the historic city of Dubrovnik, Croatia. Built between the 12th and 17th centuries, these walls were designed to protect the city from invasions and have a total length of about 2 kilometers. They are considered one of the best-preserved medieval fortification systems in the world. The walls vary in height, reaching up to 25 meters in some areas, and include several towers and bastions. Visitors can walk along the top of the walls, offering stunning views of the Adriatic Sea and the city's red-roofed buildings. The City Walls are a UNESCO World Heritage Site, attracting tourists from around the globe.