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Gacially carved Fjaðrárgljúfur canyon in Iceland
By Andrés Nieto Porras from Palma de Mallorca, España (Fjaðrárgljúfur) [CC BY-SA 2.0 ], via Wikimedia Commons Fjaðrárgljúfur is a canyon in south east Iceland about 100 m deep and about 2 kilomet…