If we come across a giant, gleaming golden egg in the middle of Swedish Lapland, our first thought will probably be that we have found an alien ship. But no! Solar Egg, located on the outskirts of the town of Kiruna, in the far north of Sweden, is actually a sauna. It was created by the well-known duo Bigert & Bergström and is made of golden mirrors that shine in the snow-filled landscape. Its exterior is made with 69 different pieces and the height of this Solar Egg reaches five meters, creating a large and cosy interior space, facing the outdoor temperatures. From the outside, all that can be seen is a shell covered in gold that reflects all the sunlight that focuses on the Solar Egg.