If you take a look at an old map when the area was full of industry,coal mines,clay pits,furnaces,brick works,glass works etc you see paths,tramways and railways all over the place which have long gone from memory but you can still see many of them in the landscape.
Some are still in use as paths or roads,sometimes leading to places for what seems like no reason,while others can only be seen by their impact on the shape of buildings which leaves you puzzled as to why they are that shape.
The New Inn on Quarry Bank High Street for instance has a lovely curved brick wall at it's rear following an old path that used to lead from workers cottages to a clay pit now long gone.
http://goo.gl/maps/Annw
At the old Harris & Pearson Firebrick and Retort works just off Brettall Lane in Brierley Hill there are several buildings with their end walls cut off at strange angles from when they had their own sidings,tramways and travelling crane.
http://goo.gl/maps/wDaI
This church in Lye is almost an acute triangle all because of a footpath.
http://goo.gl/maps/urBG
Last but not least are these factories that still follow the shape of a long gone railway creating very strange shapes to the buildings.
http://goo.gl/maps/LtiY
I would love to see some signs of long gone paths or railways on your layout for people to ponder over.