Bratislava special: Two foldable cubes for the price of one!
Here is a challenge: devise a way to print several foldable cubes on the same sheet while minimizing the amount of wasted space (of course the stereographic projections in the corner of the above picture count as wasted space). It probably requires different layouts for the various cubes, as in a giant tetris game. Bonus points for taking the glue flaps into account.
(geotags and EXIF data from the bottom panorama.)