In reply to The Lemming:
Hmm, depends!
From the Highlands, maybe this:
https://www.ukhillwalking.com/images/dbpage.php?id=308969
From Paddling trips, this one where Al and Andy nearly came together:
https://flic.kr/p/JDyqga
From local trips, a couple of Newark Priory. The second one took a lot of setting up, lining up, waiting for the water to be still, timing the shutter release etc, and is one of the extremely rare times I actually left home with a specific image in my head.
https://flic.kr/p/2bDLsYX
https://flic.kr/p/28TEYhh
Difficult to choose, these are ones others have reacted positively to.