It is located in Peer Gynt Country, the district called Gudbrandsdalen.
At some time in the past, they changed the name from Vaage to the present day Vaga.
There are little circles over the a's but I don't know how to render that on my computer.
It is pronounced, "voe-goe."
This appears to be a copy of a postcard that I believe is probably a hundred years old.