The archaeological site of Atapuerca, Burgos province, Spain (Basque territory in the Middle Ages at least) is most famous for its Neanderthal and H. antecessor remains but there is much more to it.
The Cueva del Mirador in particular has provided some data on Late Upper Paleolithic, Neolithic, Chalcolithic and Bronze Age, including about ten burials. But one of them, reported only now, is very unusual because the young woman (c. 15 y.o.) was buried in fetal position, which is something unheard of in Iberia (or elsewhere in Europe out of the Balcano-Danubian Neolithic area) before the arrival of the Bell Beaker subculture (phenomenon). The normal burial position elsewhere was in extended form, often accompanied with ochre, a practice that has its roots in the Paleolithic.
The woman was buried apart from the other tombs, suggesting some sort of special status.
The source of this news item, the blog of the Catalan Institute of Human Paleoecology - Social Ecology (IPHES - Catalan with automatic translator to other languages) hints that the remains are dated c. 4500 years ago, several centuries before the arrival of Bell Beaker or even its inception in Central Europe. Also there's no mention of anything else that reminds of Bell Beaker. The recovered burial goods mentioned are pottery (no type specified), mollusk shells (Dentalium sp.) and remnants of what might be a belt or collar.
The presence of mollusks strongly suggest some sort of connection with the Bay of Biscay coastal areas and they might have had an ornamental or medicinal use (Dentalium was considered an excellent source of alkali in pre-modern medicine).
I am thinking that it is very possible that the young lady belonged to some group of travelers (refugees, traders, pilgrims, diplomats...?) from the Danubian cultural area area, which at this date reached as far south as the Garonne at some moments (reconquered by the bowmen's Artenac culture soon after). This would explain the separate burial and the distinctive characteristics of it. The geographical situation of Atapuerca, the main pass between the Duero and Ebro basins and a key connection between Atlantic Iberia and mainland Europe does suggest it.
See also: Pileta de Prehistoria entry[es] and visual description of El Mirador Cave (PDF)[es].