The Straight of Nanteos is bordered in the west and South by the Black Sea. In the East it borders the continent of Dirio and to the Northwest it touches the continent of Calvert. In the Northeast it borders the Hea Sea
Many important port cities lie along the Straight of Nanteos; including Nanteos, Friendship, Crowe's Nest, and Psychograd on the Nanteon side. It also serves as an important waterway for the nations of Varland and Deeland on the Calvert side.