At 9 a.m., the Cathedral, the Duomo, Giotto's Belltower, the Baptistry's Gate of Paradise, Signoria Square, are all being spat upon by the skies. This disrespectful behaviour is shocking for us reverential visitors, plus it's damp and cold and inconvenient. Which is why when Carlo, our guide in Florence, hustles us into the Academy of Fine Arts, we're glad and quite eager to listen to him. Serious Carlo acknowledges our politeness by launching into the finest speech I've heard from a tourist guide. He walks us past giant unfinished sculptures by Michelangelo, all the while explaining, explaining, explaining, till we arrive at the colossal David. We spend a full half-hour studying David's stance, the muscles on his thighs, his biceps, the position of the right hand, till Carlo finally runs out of good words. I notice Chrissie and mother and a few others getting restive Carlo is clearly more moved by great art than he is by American tourists. And it strikes me that I'm on a really good tour.