In this population there finds the town hall of vale of Ultzama and the health center. To come to the nucleus principally, it is necessary to lower towards the school concentration to cross river Arkil and to rise to the hamlet clustered about the church parochial of San Pedro. The most interesting of Larraintzar is his hamlet composed by big houses, most of the XVIIIth century and some of the XIXth. The church substituted other one previous to beginning of the XIXth century. Holidays: the first Domingo de Agosto. (source I govern of Navarrese)