Altitude: 855 m
It has an area of 13.82 square kilometers and is 855 meters high, is mountainous and are the Lluçanesa, Sora Gavarresa and streams.
The continental climate conditions each composed mainly of pine, oak, oak, beech,... with an understory consists primarily of boxwood, juniper and thorn forests. We also find variety of healing and herbs (thyme, lavender, rosemary,...) and a wide variety of edible mushrooms.
Include the church of Santa María de Alpens, a Baroque-Neoclassical, heavily modified and rebuilt since 1708 building burned during the First Carlist War (1833-1840), where his bell tower is the oldest part (XV-XVI centuries); and the church of San Pedro de Serrallonga a small Romanesque building IX century shrine square and a lowered triumphal arch, which has also undergone reforms in ornamentation and in return, during the year 1724, and keeps two images Baroque St. Peter and St. Mary of the eighteenth century.
The busiest and best source preserved the municipality is the Source of the full, as some village elders are careful to do maintenance and ensure that the environment is clean and neat. It is a tradition to fetch water.
Outside Alpens enocntramos a rock wall where erosion has done a pretty curious sculpture that has served to fuel legends and superstitions, it is the Rocadepena. They say who spends a night in the Rocadepena can hear the groans of souls, first wall that laugh, and on the other those who weep. Today the group of devils village is named.
We also find the Romanesque chapel of Sant Pau del Colomer located 50 meters from the house Colomer, known since 1190. It is a converted building (1757, 1887, 1947).