Casa de Sierra Nevada in San Miguel de Allende has opened a six suite extension in the historic Casa Limon. One of the most exclusive small hotels in Mexico - Casa Sierra Nevada is a collection of five houses grouped around verdant and cool courtyards. The buildings range in age from old Spanish Colonial mansions to an erstwhile Fort and Customs House. Casa Limon has the ambience of an 18th century villa built round courtyards with fountains and has an air of tranquillity and complements the existing buildings that make up the hotel.