The Solar City Tower designed by RAFAA with the 2016 Olympic Games in mind is certainly breathtaking. During the day, it uses large solar panels to gather solar energy, and during the night, it uses a waterfall to generate the energy needed. The idea behind the Solar City Tower is to come up with a tourist attraction with an all-day source of renewable energy. Of course, after you’ve managed to close your gaping mouth, you’ll probably sit back and wonder how much energy was used to get the water to the top of the waterfall in the first place. Still, it’s a very ambitious looking concept, wouldn’t you say?