River Lochy, Gairlochy, Lochaber, Scotland

It may surprise you that the Caledonian Canal was built at all when you realise that the lochs in the Great Glen were already linked by rivers. However, my suspicion is that they weren't all navigable by boat and that the rift valley nature of the Great Glen may also have played its part. This also means that the canal runs by a river as it goes from Loch Lochy to Loch Linnhe. That is no bad thing especially when you get views like this of the hills to the north.