Mjørkadalur

Mjørkadalur is a valley on the Faroese island of Streymoy in the Tórshavnar municipality. It has no postal code. It is located on the mountain of Sornfelli above the fjord of Kalbaksfjørður. The buildings in Mjørkadalur used to be part of the Island Command Faroes, but now a part of the building is used as a detention centre for prisoners who serve short sentences. Criminals from the Faroe Islands who serve longer sentences are sent to prisons in Denmark, as there is no prison in the Faroe Islands, only the detention centre, which has room for 12 persons.
It was the site of a Danish military installation and NATO early warning radar system until the Danish authorities closed it, and handed the key of the building to the Mayor of Tórshavn on 2 July 2002. The radar continued to work until 1 January 2007. Earlier up to 200 persons from the Danish defense were living in Mjørkadalur. On 15 November 2010 the last equipment was shut down.

Wikipedia