Wales is a principality of the UK, situated in the southwest of the island of Great Britain. It borders England in the east, Saint George's Channel in the west, Bristol Channel in the south and Irish Sea in the north. Cardiff is the capital and the largest city of Wales. Compared with prosperity and urbanization of England, Wales has a great flavor of countryside in terms of natural landscape, social customs and culture. It is endowed with unpolluted natural scenery and various kinds of geographical landscape. There are three national parks and hundreds of castles in Wales.