Isdal Woman

The Isdal Woman () is the name given to an unknown woman who was found dead at Isdalen Valley in Bergen, Norway, on 29 November 1970. It is thought to be one of Norway's most profound mysteries. The case has been the subject of intense speculation for many years.
The official cause of death was a combination of carbon monoxide poisoning and barbiturate overdose.
There are many theories as to who the Isdal Woman was ranging from secret spy to a suicidal woman.