The end of Act 1 gives players of Baldur's Gate 3 a choice between traveling through the Mountain Pass or The Underdark to reach the area of Act 2. For those who picked the Mountain Pass, they'll see an old and overgrown Monastery in the background that can be approached along with an additional side quest to complete within from Esther.
Baldur's Gate 3: How To Enter Rosymorn Monastery
Rosymorn Monastery is a location in Baldur's Gate 3 that may seem tricky to enter at first, and holds a puzzle within for players to solve.