Betlán is one of the smallest towns in the Valley. A handful of stone and slate houses around the church of "Sant Peir", one of the oldest religious buildings in the valley (probably of the eleventh century), disfigured by later reforms.

Legend tells that at the time of the Romans, the giant Mandronius (capitoste of the forces against Rome), whose cave can see marked on the road to the entrance of the town, made prisoners to a large number of soldiers and sent an ear of each of them and the two of the general of Rome.