Hulen in Bergen in Bergen, Norway

Hulen ("The Cave") in Bergen is a bar and nightclub operated by students on a volunteer basis, and holds the title of Northern Europe's oldest rock club. Hulen was originally built during World War II as a bomb shelter and sits below Nygårdshøyden in Bergen's city center. Deemed unnecessary years later, the shelter was converted into its present-day club form in 1969, officially opening on May 17. Despite a history of financial difficulties, Hulen is kept alive by a committed group of volunteers and supporters.  Visitors can still experience the feeling of being in a cave or bomb shelter, with a long, spooky entrance, stone walls, and exposed pipes, which makes it a unique destination for a night out. They also have two bars inside with a decent beer selection. Hulen has concerts and club nights on the weekends, featuring primarily alt-rock and alt-pop, but also blues, jazz, electronica, and metal. Be sure to check the schedule before going (and wear earplugs!)