Tarns are mountain pools or small lakes that were formed when the glaciers retreated at the end of the ice age. Siney Tarn, in Eskdale Cumbria, is a small tarn located just above the larger and more widely known Blea Tarn. This photograph was taken from above the tarn on an uncharacteristically bright and sunny day.
<a href="//commons.wikimedia.org/wiki/User:Compo" title="User:Compo">Compo</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>