Have we got a challenge for you!
Once upon a time, and long before he joined our illustrious magazine, a certain member of Team Trail carelessly let his Ordnance Survey Active Explorer OL17 map slip out of his rucksack and into a deep crack in the rocks while lunch-breaking near the Cantilever Stone on the summit of Glyder Fach in Snowdonia.
Amazingly, many years later, it's still there! But can YOU find it?
Your mission, should you choose to accept it, is to watch this video, and get looking next time you're in North Wales...