Cañón de Añisclo, Limestone canyon in Fanlo, Spain
The Cañón de Añisclo is a limestone canyon running through the Pyrenees with sheer vertical walls on either side. The Bellos River carved this deep chasm over millennia, creating a landscape of towering rock formations and narrow passages.
The canyon gained protected status in 1982 when it became part of Ordesa and Monte Perdido National Park. This designation safeguarded its geological features and natural environment from future disturbance.
The San Úrbez hermitage sits in the depths of the canyon and reflects how communities once settled in this isolated valley. The small religious site, surrounded by towering rock walls, shows the importance of spiritual places in remote mountain regions.
You can drive through on a one-way road from Escalona to San Úrbez, with return options via Buerba, Vió, or Fanlo. Check road conditions beforehand and plan your exit route before entering.
The canyon displays thermal inversion, where drought-resistant plants grow at higher elevations while mixed forests flourish below. This unusual pattern results from local air currents that reverse the typical vegetation zones.
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