Holme Fell is a stunning location and there's a couple of tarns or reservoirs part way up from the quarry, this being the larger of the two. Apparently they were used to power a funicular system to raise slate from the bottom of the quarry. With a lack of wind disturbing the surface I was able to get some great reflections across the water.

The technical bit:
Location - Holme Fell, Cumbria
Camera - Nikon D800
Lens - Nikon PC-E Micro 45mm f/2.8D ED
Aperture - f11
Exposure - 1/4 second
ISO - 100