There's just as much going on in the caves and sewers underneath the Sword Coast as there is on the forests and towns of the surface. In Baldur's Gate 3, players can see some of this variety in locations like the Underdark, Whispering Caverns, and the Hag's subterranean headquarters.
Baldur's Gate 3 - Abandoned Cistern: Sluice Gate Puzzle Guide
The sluice gate puzzle is a bit tricky in Baldur's Gate 3. Here's how to solve it.