There are allotment gardens all over Europe, the link below is to an english site.
In Norway, the allotment movement started late in the 19th century. The first garden was founded in Halden in 1896, the second one in Oslo in 1907. Originally the gardens were meant for workers living in the cities to have the possibility to grow their own vegetables and have some fresh air. Before and during WWII the gardens were of great help. The lots were small, as were the cabins. The gardens were situated within city borders.
Nowadays the gardens are more for recreation. But they are still not meant to live in, although a lot of people spend the whole summer there. There is a lot of common activities and a place for the generations to meet. Most of the old gardens are still active, although some have been demolished due to "progress". The allotment movement has been fighting for the excistance of many a garden.
This garden is relatively new, established 6 april 1988, and situated at an old farm named Klemetsaunet within the border of Trondheim, but in an area where building is restricted, with a nice view of the Trondheim Fjord, facing (almost) north. During summer, when the sun hardly sets, it is very nice spending long summer evenings here, watching the boats passing by and seeing the sunset and the sunrise within just a couple of hours :-) As all allotment gardens in Norway, it is open for non-members to visit and enjoy, and they have an open cafe every saturday.
Where to find it: Along Bynesveien between Trolla and the ferry. You can get there by bus, car or bike, and it is a good spot to start a hike in Bymarka (the city natural park). It is very nice to go by bike around Byneset, you go through rural areas within the city of Trondheim. If you do so, be sure to make a stop at Klemetsaunet Allotment Garden!