Baldur's Gate 3 is a massive game, and that makes it easy to get lost while hunting down quest objectives. In Act 3, your party arrives in Rivington with the titular city of Baldur's Gate in the distance. This is the game's final act, so you should expect the consequences of your earlier choices to come to a head while deciding the city's fate. It's up to you to forge alliances with your companions and various factions as you will need all the help you can get in the final battle. Astarion's former master, Cazador, has embedded himself in the city. Here is where you can find his Szarr palace and face the vampiric threat.