Colinton Dell- the tunnel

I've driven through Colinton many times and thought that it would be a great place to go for a walk, but have never followed through until today.  My husband was doing a walking tour this afternoon, so we took the opportunity to go for a walk somewhere not too far away.  It was good to explore a different area.  This tunnel was near the beginning of the walk.  I debated between the colour or black and white version as both were very effective.