I was up north of here, in the middle of nowhere, access by helicopter spot working on a archaeological dig/native traditional use project last week. Our campsite was beside a beautiful bog lake with big floating shelves of sphagnum around the edges. I went down to take a look and it was covered with Drosera rotundifolia! And later I took the boat out on the lake (yes, it too came in by helicopter) and it was full of U. macrorhiza - so much so that everyone had assumed that it was elodea or some similar pond weed.
So it ain't no trip to South America, but it was still pretty cool. And I now have specimens of D. rotundifolia that are probably hardy to -40 or 50C.