Cueva de los Mosquitos Historical milestone · Barakaldo, Bilbo Handia / Gran Bilbao, Bizkaia Image of Barakaldo, not of the place itself. Site in the El Regato district with remains dated to the Epipaleolithic, around 10,000 years old, the oldest evidence of human presence in Barakaldo. Photo: Jonnybbad4 (CC BY-SA 3.0) What to see and do in Barakaldo