Pena d'Aguerri and Castillo d'Acher karst limestone peaks, Pyrenees, above wooded Hecho valley, Huesca, Aragon, Spain. July 2009

- Image ID: BRTF2C
Pena d'Aguerri and Castillo d'Acher karst limestone peaks, Pyrenees, above wooded Hecho valley, Huesca, Aragon, Spain. July 2009
Nick Upton / Alamy Stock Photo
Image ID: BRTF2C
The Hecho valley, near Huesca in the Spanish Pyrenees is very popular for hiking and birdwatching among the many beautiful limestone peaks near the border with France and for its spectacular Boca del Infierno gorge on the Aragon Subordan river, which runs through the valley. The gorge is a well known location for spotting rare birds such as Wallcreepers and is popular for canyoning.
Location: Hecho Valley, Aragon, Spain