Sierra de la Tesla-Valdivielso bird protection area Nature · Merindad de Cuesta-Urria, Las Merindades, Burgos Image of Merindad de Cuesta-Urria, not of the place itself. Almost two thousand eight hundred hectares of the municipal district, around twenty-three per cent of its surface, are protected as a special protection area for birds; on its cliffs vultures and red-billed choughs breed. Photo: Deividkiu (CC BY-SA 4.0) What to see and do in Merindad de Cuesta-Urria