Wales is located on the western side of central southern Great Britain. Its borders include England to the east, the Irish Sea to the north and west, and the Bristol Channel to the south.There are over 1,680 miles of coastline, with the landscape made up of mainly mountainous regions.he capital, Cardiff, is the largest city of Wales, and is one of the most visited places in the country. Among the most popular sites are the Millenium Stadium, which is the 3rd largest in the UK, and the Cardiff Castle with over 2000 years of history.