Vall de Boí is a municipality consisting of eight small villages with a population of between 9 and 200 inhabitants. Its high mountain environment and extreme weather contributed to the isolation of the valley for many centuries. This, together with the nature of its people, their customs and traditions and an economy based for centuries on subsistence farming, has managed to preserve the territory and its natural and cultural riches almost intact.The main attractions of the valley are the Aigüestortes and Estany de Sant Maurici National Park, the Baths of Caldes de Boí, the ski runs of Boí-Taüll Resort and the ensemble of Romanesque churches which have been declared World Heritage Site by UNESCO.