The memory of constellations passes the time as we travel between La Pobla de Segur and la Vall de Boí. Upon reaching Senterada, we see the signs for Vall Fosca, another of Catalonia’s natural wonders that deserves a detour. The road begins with gradual ascent to the top of the Coll de la Creu de Perves, with good views of the Pyrenees. From El Pont de Suert, the road passes between hills to the entrance gate of the Aigüestortes i Estany de Sant Maurici National Park. Catalonia’s only national park allows us to enjoy a spectacular natural setting: more than 200 lakes of glacial origin are surrounded by peaks around 3,000 metres high. In spring and summer, gentians and rhododendrons add a splash of colour to the green meadows.