Willy Wonka, eat your heart out. This is your golden ticket to an art-meets-spa experience. Glimmering in Sweden’s northernmost town, this gold-plated, egg-shaped public sauna is more than just an experience for travellers; it also acts as a meeting place for locals. Designed by Swedish artists Mats Bigert and Lars Bergström, the Solar Egg was gifted to the town of Kiruna after it was announced the entire city district is to be relocated because of crumbling foundations following decades of mining for iron ore. A heart-shaped wood stove heats the aspen and pine interiors to between 75 and 85°C, while solar panels incorporated into the geometric design offer eco-friendly lighting. The eight-person egg isn’t immobile either – it travels around Europe. Follow @riksbyggen to keep track of this wandering egg.