Diablo 4 will feature more than 150 dungeon locations covering a variety of tilesets depending on location. Dungeons layouts will be randomised in Diablo 4.
Dungeons in Diablo 4 will differ from previous games where a single tileset would be present in any one dungeon. Diablo 4 feature what Blizzard calls "tileset transition scenes" which effectively connects two different tilesets together to make dungeons more interesting.
Dungeons can also be be themed depending on where they are in Sanctuary or whether they are tied to a specific cultural theme.
Players can expect dungeons to feel darker and more foreboding with Blizzard embracing Diablo 4's core pillar of a return to darkness.
The March 2022 development update included some examples of dungeons found in the game world.
The Wretched Caves
Flooded Depths
This videos shows an example of two tilesets coming together in a single dungeon.
"Forgotten Places in the World"