A cirque is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie and cwm. A cirque may also be a similarly shaped landform arising from fluvial erosion.
Two cirques with semi-permanent snowpatches near Abisko National Park, Sweden
Upper Thornton Lake Cirque in North Cascades National Park, U.S.
Maritsa cirque in Rila Mountain, Bulgaria
The Lower Curtis Glacier in North Cascades National Park is a well-developed cirque glacier; if the glacier continues to retreat and melt away, a lake may form in the basin
A valley is an elongated low area often running between hills or mountains, which typically contains a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas.
Calchaquí Valley in Argentina
U-shaped valley in Glacier National Park, Montana, United States
Romsdalen in Western Norway has almost vertical walls.
Fljótsdalur in East Iceland, a rather flat valley