Dungeons and Taverns Ancient City Overhaul Data Pack Wiki & Guide

Ancient Cities still generate in the Deep Dark biome the same way as vanilla, so locate a Deep Dark biome and dig down until you hit the city structures. The overhaul only changes what generates inside the city, not where cities spawn.

This datapack replaces the vanilla ancient city layout entirely, so the old deepslate cobblestone ring structures are gone and you'll see taller, thinner walls, narrower pathways, and new smaller buildings instead. If you're still seeing vanilla cities, the datapack isn't active in that world.

The narrower roads and compact buildings make the city feel like a maze, so place torches or other markers at intersections as you go. Following the outer walls inward tends to work better than wandering the interior paths randomly.

Loot chests are spread across the new smaller houses and structures rather than concentrated in one central vault, and digging through the city floor can also turn up ancient fragments and other valuables. Check every building you pass instead of rushing to the center.