Originally posted by Cockroach:

Originally posted by Elidrin:

Look for fortresses near mountain summits. Inside you will often find a stone that will reveal the nearest spawn point.

Yeh ok. I am not finding many but I think I get it.

Some maps are bugged. I think they fixed this in the patch before last, but if you created this map before then, it could be one of the bugged ones. The bugged ones have no moder at all. See the patch notes for details, there is a way to fix this.

You can tell if you map is bugged by putting the seed into this website and then selecting to show either the Boss Stones or Bosses:
http://valheim-map.world/