Pórtes (GR: Πόρτες - Gates) or Sideróportes (Iron Gates) is maybe the most striking point of the canyon. Here the canyon walls rise nearly 300 meters while the width is only 3.5 m. At this point the water runs almost all year round. The stratified limestone, the dominant rock of the canyon, forms specific geological formations, showing all the geological history of the canyon in the eyes of connoisseurs. Portes are 11 km away from the entrance of the Samarian gorge at Xylóskalo and 4km from the beach at Agia Roumeli.