Kjustendil Fortress is a historical site located in the town of Kjustendil, Bulgaria. It dates back to the Roman period and has been an important strategic point throughout history. The fortress features well-preserved walls and towers, showcasing the architectural styles of different eras, including Byzantine and Ottoman influences. Visitors to Kjustendil can explore the fortress grounds, which offer panoramic views of the surrounding landscape. The site is not only significant for its historical value but also serves as a popular destination for tourists interested in archaeology and history.