Things to investigate in Germiston

The history of...
Provanmill Gasworks
The railway system that encircled Germiston, mostly industrial, I think.
There is an abandoned semi-circular tunnel. Will I be foolish enough to walk as far as is possible into it?
The piggeries. I believe there were two. One at Darnick Street and one where the current Coll Place flats are.
Housing in the area - tenement flats to the west; houses to the east; multi stories to the north, one having been demolished. All the tenements on the north side of Germiston have been demolished.
The quarry at the 'Gemmy'
Garngad/Germiston railway station
Blochairn Steelworks
Various industries on the Petershill Road side of Germiston.
Local shops, pubs, etc.
Workers cottages to the south of Royston Road,
Can anyone add to this list?