I have walked past these mooring pegs on the towpath of the Leed-Liverpoool canal many, many times without really seeing them. (Fell over one once, in fact!) You can see a boat moored up to them in my post of August 31. But then one day I noticed the pattern each one makes. To the naked eye they are fairly dull - shades of greys and black - but when I put the image into Photoshop and just slightly adjusted it, suddenly all these lovely subtle colours appeared.