Kyrgyzstan is a landlocked country in Central Asia, bordering Kazakhstan, China, Tajikistan and Uzbekistan. It lies between latitudes 39° and 44° N, and longitudes 69° and 81° E. It is farther from the sea than any other individual country, and all its rivers flow into closed drainage systems which do not reach the sea. The mountainous region of the Tian Shan covers over 80% of the country (Kyrgyzstan is occasionally referred to as the Switzerland of Central Asia, as a result), with the remainder made up of valleys and basins.