The curved rail bridge from harry potter is nearby i seem to recall, and if you havent done loch ness then you kinda have to... a couple of waterfalls around the western shore into the mountains. There are a few nice driving roads around fort william... there is a castle on a loch to the west somewhere - i remember driving to it on a twisty road and then being led down what looks like a private driveway to come to a small car park, a beach and beautiful scenery with the castle on a tidal causeway (no it wasnt Eilean Donan...). If you have a look at a map the A830 goes west from fort william, i swear that is where i came back in from, and i started out going down the west shore of the loch going south from Fort William... so from above it looks like i just did a loop around that area to the west.  Kinda nice scenery as i remember it, windy roads tho, so it takes longer than you think it would. 

Good luck on seeing the top of Ben Nevis ;) isnt it an average of 5 days a year or something that the summit is clear of clouds? (Ben Nevis means cloudy peak i seem to recall)

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
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