Here's an odd little commuting curiosity from Romania called the Carpii 4ciclet. It's a four-wheeled stepper cycle targeted at older riders that transfers most of the pedaling work from the quads over to the calves, back, abs and backside.
A house in Romania has been built in just the sort of environment it is designed to help protect. Passive House Che is situated in a forest in the Romanian city of Suceava. In addition to a host of sustainability features, the house also has a large net suspended between floors and an indoor lawn.