For many players of Baldur's Gate 3, they may not have figured out the introduction and guide to the route from the tea room to the underdark in Baldur's Gate 3. Don't worry, please read "Baldur's Gate" shared by the editor of "Source Code Network" "Baldur's Gate 3 Tea Room to Underdark Route Guide", this article may be able to help you.
1. The player comes to the riverside teahouse and climbs down the fireplace.
2. When you see the green door, stop and take the Whispering Mask from the door.
3. If you continue walking forward, you can see a small waterfall and jump into it to fight the hag.
4. After winning the battle, continue climbing and put on the Whispering Mask to see the hidden passage.
5. After entering the hidden passage, you can be teleported to the underdark area.