Diablo 3 -
Walk through the front gate and explore the Cemetary of the Forsaken. The goal here is to find the Chancellor's Altar, which can be in one of the three Defiled Crypt dungeons here. There are four possible Defiled Crypt locations, the one in this picture, one North, and two Southeast, but usually only three Defiled Crypts will spawn in a game. It's random where the Altar is, you'll just have to explore until you find it.