Atapuerca is a Spanish town in the province of Burgos, Castile-Leon, that gives name to the Sierra de Atapuerca or Sierra Atapuerca, an ancient karstic region of Spain, containing several caves such as the Gran Dolina site, where fossils and stone tools of the earliest known hominids in Europe have been found. According to Jose Maria Bermudez de Castro, co-director of research at an archeological site in Atapuerca in June 2007, findings have uncovered anatomical evidence of the hominids that fabricated tools more than one million years ago.