Sant Nicolau de Boí is a chapel with a single nave and apse of the term of the Boí Valley, located at the entrance of the inner zone of the National Park of Aigüestortes and Sant Maurici. It is controversial whether this Romanesque church does not appear among the papers of the Romanesque Catalonia. Although in good condition, normally only open the first Sunday of July, when the inhabitants of Boí made a pilgrimage to the chapel and lunch. From the parking of "Palanca de Molina" at the entrance to the valley, take the path otter, the river that goes from St. Nicholas for its northern border. "Palanca de Pei" cross the river and while away a little, it runs along the other side, until you reach the chapel shortly before reaching Lake Llebreta.