As they go, they see strange fish swimming around them, and lobsters and seaweed and long swaying plants. Then they swim over a large white monument.

"This is the church of Santa Maria della Salute, which was built many, many years ago to give thanks when the great plague in Venice came to an end. But let's go and see St Mark's. It's the most beautiful one! In front of it there is a large square, where all the people of Venice meet, as they always have. But now they also meet flying fish and seahorses and shells scattered among the clumps of black seaweed."