Geograph - photograph every grid square

No WIMPS here - entrance to Boulby Mine

The underground laboratory for Dark Matter Research, 1,100 metres underground, within Cleveland Potash's Boulby Mine was officially opened on 18 April 2003. The experiment was conceived to search for Weakly Interacting Massive Particles (WIMPs) and is run by a consortium consisting of astrophysicists and particle physicists from the United Kingdom. The aim is to detect rare scattering events which would occur if galactic dark matter ('the missing mass of the Universe') consists largely of a new heavy neutral particle. Sadly none of the elusive particles have yet been found.
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There is another photo of the mine entrance here NZ7618 : The entrance to Cleveland Potash Boulby Mine