The Adamantine Forge is found near the end of the first act of Baldur's Gate 3, assuming you chose to travel through the Underdark to get to the Moonrise Towers, that is. If you went via the Mountain Pass instead, you won't find it naturally during your playthrough but you can go back that way if you want to see for yourself what's there.
Once you reach Grymforge, you'll be able to see the Adamantine Forge off in the distance. It seems impossible to reach, and the way to get there isn't exactly obvious, so I'll explain everything you need to know to get started, including tips to beat the boss you'll encounter.. With that in mind, here's how to unlock the Adamantine Forge in Baldur's Gate 3.
