The location of the overgrown tunnel mushroom circle in Baldur's Gate 3 can be found near the Pungent Workshop. It is relatively easy for players to find it. After finding it, they can directly enter the Pungent Workshop.
Answer: You can find it near the pungent workshop.
First, players need to pass through the poisonous mist of the tunnel in the game, and then go to find the mushroom circle of the tunnel.
On the way, you can choose to kill the hag directly or enter the pungent workshop directly.
Near the pungent workshop is the mushroom circle, which is where the light shines in the picture.
After reaching the bottom floor, start sneaking and touch the wall on the right to enter the pungent workshop.