Wales is located in the southwestern part of the United Kingdom. The indigenous people of Wales are the Celts. For local government purposes, Wales is divided into 22 council areas. The capital of Wales is Cardiff, which has seen significant development since the 1990s including a new waterfront area. Important symbols of Wales include the red dragon flag, the national anthem, and traditional foods like cawl and Welsh cookies. Significant landmarks include Cardiff Castle, Harlech Castle, and Snowdonia, which contains Wales' highest peak Mount Snowdon. The longest river in Wales is the River Severn and major cities include Swansea and Newport.