In reply to Nacho-Shep: If you've only got a couple of days in Lochaber, you like mountianeering and the weather turns out nice then don't waste one of your days in the Ice Factor ( no offence meant Ice factor, I love climbing walls)
You'll have a much more memorable day walking up to Carn Mor Dearg or the Aonachs to see the N face of the Ben, and if you start from Glen Nevis you'll get to walk up through the gorge and past the waterfall too ( which would be a nice day if you just stopped there)
Simlarly you could have a great day out up the Lost Valley onto Bidean and back down over Stob Coire and Lochain (and you wouldn't be sorry if you just stopped in the lost valley).
If you're further up the road then Forcan Ridge on The Saddle or the Tourist Route ( don't be fooled by the name ) on Sgurr nan Gillean are superlative mountain days ( though a bit more fall-offable than my other suggestions and a bit of ropework might be needed on either fo these if you're not confident).
I've spent thousands and thousands of hours in climbing walls... but don't just go to the climbing wall.
There's no view from the summit of a climbing wall.