Bir Tawil (Egyptian Arabic: بير طويل, romanized: Bīr Ṭawīl, lit. 'tall water well', [biːɾ tˤɑˈwiːl]) is a 2,060 km (795.4 sq mi) area of land along the border between Egypt and Sudan which is claimed by neither country. Together with the neighbouring Halaib Triangle, it is sometimes called the Bir Tawil Triangle, despite its quadrilateral shape; the two regions border at a quadripoint.
Its unclaimed status results from a discrepancy between the straight political boundary between Egypt and Sudan established in 1899 and the irregular administrative boundary established in 1902. Egypt asserts the political boundary, and Sudan asserts the administrative boundary, with the result that the Halaib Triangle is claimed by both and Bir Tawil by neither. As of 2014, Bir Tawil was the only place that was habitable but not claimed by any recognised government.