Canillo is the capital of the parish (region) of the same name, the most extensive in Andorra, which occupies the northeast section of the Principality and includes vast areas of forest, open mountain ranges of great natural interest and large towns such as Soldeu, El Tarter, Ransol, Prats, Meritxell or Molleres. Canillo houses some of the best examples of the Andorran architectonic heritage.