Cessnock arches

For the last few years the Glasgow Underground network has been undergoing a £290M modernisation on all 15 stations.
The Subway [Underground] station at Cessnock is one of only two to retain it's pre-modernisation surface buildings (Kelvinhall being the other).
Cessnock station sits under a 3 storey residential block, and has these ornate cast iron signs at the entrance. They were designed to be in keeping with the character of local buildings by renowned architect Alexander 'Greek' Thompson, and I think they add some charm. Installed in 1989, they were removed in 2013 as part of the station revamp, but following a public outcry and online campaign they were soon reinstated. (Kudos to Strathclyde Partnership for Transport for actually listening to the public).

The Glasgow Subway is the third oldest underground metro system in the world (after London Underground & Budapest Metro). It is the only heavy rail underground metro system in the British Isles outside London, and is the only one which operates completely under the ground.