Visitors can tour the Royal Palace, walk the narrow streets of the Casbah des Oudaya, visit the 12th-century Tour Hassan, Bouknadel and Chellah, which has interesting museums of 17th-century fortress and Roman ruins. There are many other places of tourist interest, like the Archaeological Museum, Bou Regreg Dam, Consules Street, Hassan II Avenue, Museum of Moroccan Arts, and Oudaias Kasbah. Sale, with its Grand Mosque, city gates, markets, small back streets, and a harbor filled with fishing boats, is also a tourist's delight.