Outside a the city of Lund in Sweden there is a pond of blue water. Even though the water is clear it is drainage water from the city. And, although there are signs all around that say "Danger! Do not touch the water!" water fowl have built their nests here. Here ducks, coots, swans and cormorants swim and fly around, and rest by the water line. It is a calm pond separated from the bread eating ducks near the city center.