In response to the reviewer (December) who didn't know there were lifts and had to walk up the stairs - there are lifts that go up to the floor below the roof! We were pounced on when still 100 yards from the front door by Peter. our guide, who took us in and escorted us to the roof. Without Peter it would have been unpleasantly pricey as all you would have was a great view of the city and beyond but no idea of what was what. Peter filled us in on lots of local information and spent a good half hour with us. The only downside was that, once the tour had finished he proceeded to give a hard-luck story of truly epic proportions along with subtle drop-ins of how much some good samaritans had given him (hint, hint) which sort of soured things a little as I was already going to tip him well as he had made the trip so worthwhile for us. It left me feeling a bit hustled - and he would have got more from me had he not said anything after the tour. My tip, as i think Peter is the main guide there - tip him before he launches into his sob story.