Hello!
Thomas West Derwentwater and Coniston stations, Swallows and Amazons, Ling along a lucky and I think there's one on an island on Derwentwater too...
There are also a few caches along the lake shores close to the above which can also be picked up by boat.
They're all in Cumbria though, so it might be a bit far...
PM for more information if you're interested.