The gorge of la Horadada Nature · Oña, La Bureba, Burgos Image of Oña, not of the place itself. North of the town the Ebro breaks the limestone barrier in a narrow gorge with vertical walls through which it leaves the municipal district. It is the natural feature that has conditioned the passage of roads and travellers for centuries. Photo: WikiBurgos (CC BY 3.0) What to see and do in Oña