The city you're referring to is likely Carcassonne, France. Carcassonne is a walled, medieval village and fortress located in the south of France. The city was founded as early as 600 B.C., and the walled fortress was built nearly one thousand years ago. Carcassonne is one of the most well-preserved fortified cities in Europe and is a popular tourist destination, attracting visitors from around the world to admire its historic architecture and rich cultural heritage.