Take a look back at some of the EPODs our viewers found particularly eye-catching. Today, and every Saturday EPOD invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers’ Choice polls. Join us as we look back at these intriguing and captivating images.

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Photographer: Isaac Lozano Rey

Summary Author: Isaac Lozano Rey

The beautiful Serra del Montsec, pictured here, is located on the southern slope of the Pre-Pyrenees Mountains in Spain. This fascinating landscape is divided into different areas by striking gorges (congosts), gouged primarily as a result of erosion by the Noguera Pallaresa River and the Noguera Ribagorçona River (featured above within the Mont-rebei Gorge). To the left is a land referred to as Aragon and at right is Catalonia. The calcareous rocks in Montsec host an enormous collection of plant and animal fossils -- two unidentified examples are shown above. Photos taken on July 12, 2010.