The Geometric Staircase at St Pauls Cathedral in London built of 141 steps each just resting on the one below and only 4" / 10cm embedded in the wall.
Used as a filming location it appeared in Harry Potter and The Prisoner of Azkabhan.
5 exposure HDR shot on a Canon EOS1000D and processed in PS8
Featured in Heritage In Stone 06/08/11
124 views at 13.09.11