The GR107 or the Cami dels Bons Homes is a trans-Pyrenean route that runs along the paths followed by the Cathars in the thirteenth and fourteenth centuries, during their flight from the crusades and the Spanish Inquisition. Critics of the Catholic church and the feudal system of the era, they were considered heretics and persecuted under the rule of the king of France. Their complete itinerary, measuring 189 kilometres, starts at the Santuari de Queralt in Berga and ends at the castle of Montsegur in the French region of Ariège. In the village of Bagà you can visit the Cathar Interpretive Centre, which tells the history of this religious community of men and women based in the historic region of Occitania.