It was added to Vilaplana in 1961. It is situated in the mountain range with the same name. The highest point of the area is the Puig Pelat, which is at a height of 1071metres.

Its area before 1961 was of 16.59Km². Only 7.5% of them are cultivated. Thus, it is a township with not many ways of making richness.

From 1959 it is uninhabited. The name of "Almussara" has an Arabian origin. It was a part of the "Valiat of Siurana". Some time after this it belonged to the Prades Earldom.