Return outside, cross the square and take the lift to the top of the Campinile where the view is just stunning. In one direction you look down on terracotta rooftops. Turn around for a bird's eye of the square and the crowds milling outside the cathedral. Turn again and take in the view across the lagoon to the islands beyond.I was lucky enough to be in Venice for the last day of one of the famous carnivals. The crowds are even more dense than in the height of the summer but the atmosphere is electric. Costumed performers strut through the streets, pausing to strike a pose for the photographers before moving on. This is an unforgetable experience.

