Ice Music Geil is an alternative music festival where the instruments, the stage and the concert area are all carved out of local ice and snow. The brainchild of Norwegian Terje Isungset, the man who ‘invented’ ice music (and still performs every year in Geilo), the Ice Music Festival is the oldest festival of its kind in the world. Today it draws performers and visitors from far-flung corners of the globe, as both artists and audiences relish the opportunity to be part of a truly unique musical experience.

Source: https://theculturetrip.com/europe/norway/articles/10-festivals-you-will-only-find-in-norway/