As I rode away from the cafe stop I visit most often, I looked left into the trees for no particular reason and saw a ventilation tower for the railway tunnel that runs near where the cafe is. I must've been past this 50 odd times but never noticed this. A bit more googling revealed there's another one I've missed on Saxelbye hill. It made me think; what are the buildings/landmarks etc. you've not noticed for years on a regular route?