Above Lago Ercina, a short unmarked path climbs to a viewpoint known as the Mirador del Príncipe — a rocky outcrop above the lake bowl with views that extend beyond the lakes to the full western face of the Picos and on a clear day to the Cantabrian coast in the distance.

Twenty minutes up from the lake shore. No facilities, no signage beyond the path itself. The kind of viewpoint that exists because the mountain is there rather than because anyone decided to build infrastructure around it.

Go in the late afternoon when the light drops behind the western peaks and the lakes turn a deeper shade of green below.