Painted in the Catalan colours of ‘sang et or’ (blood red and gold), le petit train jaune was built at the beginning of the century in order to link the towns and villages high up in the mountains with Perpignan and Prades, the principal administrative towns. It links Villefranche-de-Conflent with La Tour de Carol,  is 63 km long, and made up of wooden compartments with bench seating.