El Padrún megaliths Curiosity · Aller, Caudal, Asturias Image of Aller, not of the place itself. Three dolmen-type funerary structures, also called Cantu de Cruces, on the ridge that separates Aller from Lena near Boo. Dating from around 4000 BC, they are the oldest known trace of human presence in the municipality. Photo: Luis Velasco (CC BY-SA 2.5) What to see and do in Aller