Phase 2 of Season of Discovery now lets you gain some extra XP with a brand new item: the Cozy Sleeping Bag. This item is unique to SoD and can be obtained regardless of the faction you are part of.
GET MORE XP! Cozy Sleeping Bag in Season of Discovery is GONE
If you're Alliance, you'll need to start in Westfall. There's a note that you can find in the starred area above; look for it in a field full of Harvester robots. The note reads: "All that burns is not lost. Find the twin land, find the place." Make sure to pick up the quest, and you'll need to head to the Barrens. Take the boat from Stranglethorn Veil to Ratchet.
Then you need to take the Crossroads Road south. If you are Horde, start in the Barrens at this location and then head to Westfall.
Related: Best Runes for Druid in WoW Season of Discovery