Floating above the Parc André-Citroën in Paris, France, we find a gigantic tethered hot-air-balloon. If you look closely at the shadow you can see that the “basket” has no bottom! Have the occupants plummeted to their untimely deaths? No, rather un-dramatically this balloon’s gondola has been designed as a circular platform with a huge hole in the middle. Here’s a good gallery with some on board shots (from which I also realised that all the little rectangles of white in the park are actually people’s picnic rugs). Thanks to Craig Simpson.