The old Bergenhus Fortress has dominated the entrance to Bergen's harbor since the late 16th Century, and remains one of the most impressive such structures in Scandinavia. 

Be prepared to spend time in the excellent Bergenhus Fortress Museum with its fascinating exhibits relating to the contribution of women and resistance groups during the 1940-45 German occupation.

 Afterwards, stroll up to the walled remains of Sverresborg, a fortress built around 1660 on the remains of an even older 12th Century castle.