Church of San Lorenzo de Vallejo de Mena Monument · Valle de Mena, Las Merindades, Burgos A Romanesque church that shares stonework and workshop with the neighbouring one at Siones and that forms with it the most notable ensemble of the valley, dotted with one hundred and twenty-nine settlements spread over its slopes. Photo: Zarateman (CC BY 3.0) What to see and do in Valle de Mena