Fodor's Expert Review Camí dels Enginyers
From the ski area of Núria, at an altitude of 6,562 feet, the dramatic, occasionally heart-stopping "engineers' path" is best done in the summer months. The three-hour trek, aided at one point by a cable handrail, leads to the remote highland valley of Coma de Vaca, where a cozy refuge and hearty replenishment await. Phone ahead to make sure there's space and check weather conditions. In the morning you can descend along the riverside Gorges de Freser trail, another three-hour walk, to Queralbs, where there are connecting trains to Ribes de Freser.