Visits to the towns of Montlluís, interesting for its walled enclosure (where the Peace of the Pyrenees was signed) that hosts a military citadel and the oldest solar energy plant in Europe (1050). Visit the celebrated mountain and ski resort of Font Romeu, the Olympic Village, the Hermitage and the walk up to the calvary geodesic center of la Cerdanya, with wonderful landscape views. The oldest solar energy plant of Europe is located in Odelló.