I've recently returned to Geocaching, after an extended absence where I was tempted away by various AR mobile games...
A couple of my favourite caches from the past are the infamous Whitespace (GC1AF96) and the soon to be archived Cold War Cache (GC32REK).
What are some of your favourite caches, in the UK and beyond? They could be challenging to get to, or just a memorable location. Mostly I'm looking for inspiration for a day out, or a weekend away.