Check for missing way; survey needed
footway to O'Loughlin Court 10, 11 and 12; and/or
driveway for O'Loughlin Court 13

This substation seens to have been mostly demolished, though some of its elements may remain in place.

Source: Compare Esri Clarity => Esri

There does not seem to be a building here. There may be / have been ruins at one point (Esri Clarity).

Street name "Hillcrest" looks like a housename or name of the building itself.

Missing barrier node, layer tagging or similar
Intersection of footway and barrier

Missing plaque on bench

https://www.mapillary.com/app/?pKey=463656968041388&focus=photo

Missing mural artwork nearby, assuming it is still accessible.
As signed
https://www.mapillary.com/app/?pKey=250072007838331&focus=photo

Use for reference only, articles i.e.
https://www.kilkennypeople.ie/news/callan/889271/mount-carmel-mural-is-helping-to-reconnect-with-the-callan-community.html

"Unknown structure"
"Low-lying concrete and brick structures of unknown use/history. Landscaping of curved, low-lying brick retaining walls with concrete cappings."
"possible old children's push merry-go-round?"

This may be a (disused) leisure=playground and/or amenity=stage

Missing possible man made objects on wall.
Though may be part of structure and not so old.

Seems to be inscribed "K. Walsh."

https://www.mapillary.com/app/?pKey=1186969531724863&focus=photo

Missing possible POI, survey needed.
(bollard with a yellow hand shape on it)

https://www.mapillary.com/app/?pKey=1669166856929012&focus=photo