In the western section of the Shadow-Cursed Lands, the main region of Act 2 of Baldur's Gate 3, players will come across the town of Reithwin. The town became home to a cult of Shar thanks to its leader, Ketheric Thorm, and when Thorm died the first time, he cursed the land surrounding the town with eternal darkness.
Baldur's Gate 3: How to Find the Sharran Sanctuary in Reithwin
The statue in the Reithwin town square contains a secret that attentive Baldur's Gate 3 players will find useful.