Hello MN. DD and her boyfriend are holidaying in Sydney over the Christmas period, and I want to treat them to a night or two in the Blue Mountains for a Christmas present. But I've never been, and so I don't know if two nights are better or one night is enough, what's fun to do there for young people, where they should stay etc etc. Would be very grateful for any tips or experiences. They'll have the use of a cousin's car, so can drive themselves.
TIA.