We stand at the beginning of one of the greatest ecological disasters in the time on Man. The world is warming and seas are rising. We may deny it, but we can't hide when the water comes. Already the streets of Miami flood regularly and Mick Jones looks more and more prescient when he sang that "London is drowning and I, I live by the river!" all those years ago. And yet water is life. It brings change. Where one thing is wiped away, another rises in its place. There has always been romance and adventure in the streets of a drowned London or on gorgeous sailing cities spanning a submerged world, sleek ships exploring as land gets ever rarer.