The surface of this pyramid is covered in solar panels. It opens only when there's enough sun to generate energy. The generated energy is stored in the batteries next to the pyramid. Inside the pyramid is a restaurant. These pyramids can be found around the world in the places with lots of sun.
I believe that it’s important that we are aware of the kind of the energy we are using, and that we don’t waste it, but try to find ways to re-use it.
Interview with Fedde: https://youtu.be/uptukJIOuYA