- The Canal was built by hand and was as much a job creation scheme for dispossesed Highlanders as it was to be of benefit to shipping.
- It went way over budget.
- By the time it was built ships had got bigger and couldn't fit along it. So it turned out to be a bit of a white elephant.
- Loch Ness is deep enough to hold 3 times the world's population. (Though I don't know if this was worked out based on the current population or if this is an out of date fact).
I'm sure there was more, but I don't remember.