These are the bings (spoil heaps) from the various shale mines that used to be in the area. They reach a height of 240m above sea level and have now been given protected status as an historic monument. The photo was taken during May 2012.
The technical information is as follows.
Camera - Canon EOS 5D Mk II
Shutter speed - 1/25
Aperture - f16.0
Lens - Canon EF 24 - 105mm f4.0 L IS USM
Focal Length 45mm
Filter - Hoya Pro Polariser
Copyright © Tom Gilland