>>If I could only see one site in Scotland (or possibly in the world) it would be Callanish. It's worth the journey.

Especially if you can get a curly faced person to drive you;-)

But yea, I'd be tempted to go to Callanish if I got North of.. well . . Blackpool actually. But seriously, £160 for two people & a car on a ferry from Ullapool, may be the best Megalithic money you can spend with regards traveling.

(of course, then there's Ireland, Orkney . . )