If you and your group are particularly fond of detailed dungeon exploration, and if your schedule allows for it, you might want to prepare your own dungeon archive.
This is straightforward: whenever you have some time, jot down a few notes about potential dungeons — a notebook is fine, but you might also choose to keep them on your device or inside the cloud storage. Then, whenever you need to "improvise" a dungeon, you can instead grab one from your archive. You'll probably need to make a few adjustments on the fly, but it's easier than having to come up with everything on the spot.
When preparing dungeons for your archive, keep the following in mind:
You can of course draw your own dungeon layouts: an activity some find very relaxing, but one that can prove quite time-consuming as well. Be mindful about how you spend your effort!
The biggest risk when relying on the dungeon archive is to "shoehorn" a dungeon you prepared into a location, or to refrain from an otherwise cool and unique improvised design just because it feels safer to use a prepared dungeon instead.
As the Game Master, it is your responsibility to find a balance between prepared and improvised dungeons — both have their pros and cons.
If you're in need of inspiration when creating a dungeon (whether improvising or preparing it in advance), you may roll d20s or choose options from the tables on the following pages!
A millenary presence ensures the dead buried within the Necropolis of Basitrale rest undisturbed.