Venice

Known for its gondolas, its sunsets and amazing light, Venice is the world's only medieval city still standing today. For 1000 years, Venice was a trading capital, an economic power linked to the sea. It was the centre of activity and the warehouse for tradesmen, seamen and artisans. But annual floods and 21-million tourists a year are compromising the city on stilts, and Venitians struggle to find a solution.