However, Jotunheim cannot be visited until after completing the first quest arc in Asgard. Speak to Valka after completing the Asgard missions and get a quest called "Going Deeper." Eivor will be instructed to pick Fireweed and St. Johns's Wort.

When should I go to Jotunheim AC Valhalla?

You will get Jotunheim by completing quests. You can freely leave this location and return here later. You can return to Jotunheim even after completing the storylines in that area. The recommended experience level for this region is 190.

What level is Jotunheim AC Valhalla?

Jotunheim has a recommended power level of 190, and it seems bigger than Asgard to me (this might just be that less of the map is water so it feels bigger).