Center of the world map.
Capital of Sacred Grove and home of the World Tree.
Sanctuary is just about in the middle of the Free Realms map, the heart, and capital, of Sacred Grove. If you speak to Vaelen Warpwatcher right by the warpstone in Snowhill he will teleport you to Sanctuary! Once there, you will now be attuned.
Some interesting lore from within the Memorial Caverns in Sanctuary has been discovered.