In southern Ontario in Canada, I've seen carnivorous plants flourishing on floating mats of sphagnum moss. It's much more hazardous to be a human exploring them, with the ever-present risk of sinking to your waist -- or worse -- in the glacial ponds that lie beneath. On and near the Bruce Peninsula, between Lake Huron and the Georgian Bay, lie otherworldly marl bogs: silty (and oddly alkaline) mud flats dotted with glacial rocks and sphagnum hummocks populated with pitcher plants, a variety of sundews (including the uncommon Drosera linearis) and the northern butterwort Pinguicula vulgaris.