The Samariá Gorge is a national park on the island of Crete, and a major tourist attraction of the island. It was created by a small river running between the White Mountains (Lefká Óri) and Mt. Volakias. While some say that the gorge is 18 km long, this distance refers to the distance between the settlement of Omalos on the northern side of the plateau and the village of Agia Roumeli. In fact, the gorge is 16km long, starting at an altitude of 1,250m at the northern entrance, and ending at the shores of the Libyan Sea in Agia Roumeli. The walk through Samaria National Park is 13 km long, but you have to walk another three km to Agia Roumeli from the park exit, making the hike 16 km. The most famous part of the gorge is the stretch known as the Iron Gates, where the sides of the gorge close in to a width of only four meters and soar up to a height of 500 m.