It has a hydropower, it is cold and it has good connectivity.
Hydropower is a great source in Scandinavia as it is renewable source and cheap to produce. There is close to 4,300 megawatts of hydropower available which is 4 times the power of Hoover Dam.
The average annual outdoor temperature is 2°C which offers lots of potential for free cooling and less cooling energy needed.
Good infrastructure and connection to various locations is a key element as well.