GR-291 between the Obarenes and the Ebro Activity · Santa Gadea del Cid, Ebro, Burgos Image of Santa Gadea del Cid, not of the place itself. A long-distance footpath of some sixty kilometres linking the sierras of the natural park with the banks of the Ebro and passing through Santa Gadea, allowing the contrast between limestone moorland and river meadow to be walked on foot. Photo: Zarateman (CC0) What to see and do in Santa Gadea del Cid