Where is the holsteinburg?

Answer 1

Holsteinborg (or Holsteinburg) is the old name of the community Sisimiut on the west coast of Greenland, approximately at 66° 56′ 20″ N, 53° 40′ 20″ W

Answer 2

There is no known location called Holsteinburg. It is possible that you may be referring to a fictional or private place not publicly recognizable.