The initial question in this thread posed the question(re lakes/meres. waters,tarns) "are there any songs about it?".
    Well there arent any songs explaining the difference between a lake and a tarn(that I know of) but I do know the following fiddle tunes.
Windermere Regatta.
Elterwater Hornpipe.
Elterwater Quickstep.
Ullswater Regatta.

Interestingly,the high fells do not feature in the titles of fiddle tunes.The fiddlers named the old tunes before the romantic view of landscape and tourism impinged on the natives(c 1840ish??), and Scafell and Skiddaw etc dont seem to have been things that inspired fiddlers. I know of only two traditional fiddle tunes from the lake district that are named for hills(Latrigg Side and Stybarrow Crag), and these are both attractive lowlying places by lakes, not mountains. But generally towns, villages and friends' names seem to feature far more in tune titles, rather than the postcard views we delight in nowadays.