A. Waston and Co access cover from University Gardens in the West End of Glasgow. I love coming across these old bits of street furniture as they are a reminder of long-gone businesses. In this case, it's a firm established by Archibald Watson in 1833 which went on to become one of the best known plumbing and gas-fitting firms of its age and was based at 86 George Street.
A fragment of the old Monkland Canal passing under Castle Street in Glasgow.
Designed by James Watt, the Monkland Canal was completed in 1794 and was built to bring coal from the mines around Monklands into Glasgow. Most of it was filled in in the 1970s when the M8 motoway was built on top of it, but small fragments like this remain.
If you look carefully at the iron guard on the bridge pier on the left of this picture, you can see where the ropes used to pull the barges have cut into it.
Thanks to Centre-Ground on Twitter for bringing this interesting remnant from the past to my attention.