Oak woods of Obécuri and Bajauri Nature · Condado de Treviño, Ebro, Burgos Image of Condado de Treviño, not of the place itself. The hills in the southeast of the enclave link up with the Izki natural park, which holds Europe's largest continuous stand of Pyrenean oak; in autumn the oak wood turns the whole slope of the county ochre. Photo: Basotxerri (CC BY-SA 4.0) What to see and do in Condado de Treviño