The document summarizes key information about four capital cities in the United Kingdom: London, Cardiff, Edinburgh, and Belfast. It provides details about London's central business district, landmarks like Big Ben and Buckingham Palace, and districts like the East End. For Cardiff, it notes it is the capital and largest port of Wales, and contains landmarks like City Hall. Edinburgh is summarized as sitting on seven hills, containing the old and new towns, and its university being one of the oldest in Europe. Belfast is described as Northern Ireland's capital and a modern city situated near mountains and rivers.