Just outside the city of Tromsø lies a fascinating piece of history – Olavsvern, a decommissioned Royal Norwegian Navy base.  This base is a major attraction itself, thanks to its unique structure and role during the Cold War era.  Carved right into a mountain, Olavsvern boasts a dry dock for submarines and an entrance tunnel that stretches over 900 meters.  While the base itself doesn't offer nightlife or shopping experiences, visitors can delve into Norway's strategic military planning and gain a glimpse into this bygone era.  For those seeking lively entertainment and diverse shopping options, the nearby city of Tromsø beckons.