1) Basque Mountains 
Anboto (1331 m) is a limestone mountain of the Western Basque Country, the highest peak of the Urkiola range and not far from the pass of Urkiolamendi between Durango and Vitoria-Gasteiz. == Description == An immense mass of limestone, very compact and of gray color, the mountain contains fossil remnants of massive prehistoric corals and large sea...