The 'whale' is actually a project from Vincent Callebaut Architects called Physalia Physalis or 'Water Bubble', and it has a very serious point. One billion people don't have access to clean drinking water. This vessel is designed to float up and down the rivers of Europe, purifying the water as it goes. It is of course a huge floating garden among other things, with interior gardens dedicated to Earth, Water, Wind and Fire. So in theory it would make the Thames drinkable. It is also apparently completely self-sufficient, being covered in solar panels. In fact, it is meant to produce more energy than it uses. Too bad it is only a concept for now.
Link - via babycreativeblog
From the Upcoming ueue, submitted by Babycreative.