Forsvaret Alnabru

Alnabru is a neighbourhood of north-eastern Oslo. It lies in the middle of the southern part of the Grorud valley. The name – which means "Alna bridge" – comes from that of the Alna River, from which are also derived the names of the old Alna Gård estate and the borough of Alna, in which Alnabru is located.
Data from: en.wikipedia.org