The glacier <a href="https://en.wikipedia.org/wiki/S%C3%B3lheimaj%C3%B6kull" class="extiw" title="w:Sólheimajökull">Sólheimajökull</a> of Southern Iceland, photographed in March 2007.  The amount of glacial retreat to be noted in this photograph is outstanding, especially considering that the glacier had retreated about another 50-100m further than shown in the photo since the last yearly markers were laid.
Martin Peeks
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>