The document describes the Leizaran river in Spain. It is 124 kilometers long, starting in Leiza and ending in Elduain. It flows through a valley in Leiza that is approximately 69.72 kilometers long. The average yearly temperature along the river is 11.4 degrees Celsius, and it is normally cloudy and rainy. Various plants and animals inhabit the area around the river, including reptiles, birds, small mammals, and fish. The document also briefly describes the Plaiaundi beach natural park in Gipuzkoa between the Bidasoa and Jaizubia rivers, noting its climate and that it contains lagoons with seaweed and plants. Various birds, amphib