Fjaðrárgljúfur is a canyon in south east Iceland. The Fjaðrá river flows through it. The canyon has steep walls and winding water. It is up to 100 m deep and about 2 kilometres long. It is located near the Ring Road, not far from the village of Kirkjubæjarklaustur. Its origins dates back to the cold periods of the Ice Age, about two million years ago. The canyon was created by progressive erosion by flowing water from glaciers through the rocks and palagonite over millennia.