Unanibia bridge over the river Leitzaran, in the area of Otieta (Andoain), Gipuzkoa very close to the Plazaola Greenway and the Leitzaran Visitor Centre. Also known as the bridge of witches (sorgin zubia in Basque), it is a stone bridge, with a length of 31 meters that has 3 eyes on rounded pillars of 3 meters. It is often covered with vegetation by the rainfall of the humid zone where it is located.