The Caledonian Canal is across the fault line between Fort William and Inverness and true canal links Loch Linnhe, Loch Lochy, Loch Oich and Loch Ness.
We hired a cruiser for a week from Caley Cruisers which was great fun.
There are loads of things to see and do along the way. For example Urquhart Castle
http://www.historic-scotland.gov.uk/propertyresults/propertyoverview.htm?PropID=PL_297
Well worth a visit even if not on the canal is Fort Augustus where you can find a flight of 5 lock gates on the canal.
http://enjoylochness.com/visit/fort-augustus/about-fort-augustus/
We ate at the boathouse which was great and in a lovely location.
http://www.lochnessboathouse.co.uk/
robandh 