Explore the forgotten caverns and ancient lairs that lurk deep beneath the earth's surface. Welcome to the Undercaverns theme from The MAD Cartographer!
Maps in this Product
- ➤ Fane of Night: Open-air worship site from a ruined temple, with glowing geodes as lanterns.
- ➤ Fishfolk Village: Village by an underground lake, built from shipwrecks; features a small violent deity altar.
- ➤ Mind-Feaster Colony: Eldritch lair with alien technology and mind-wrecking runes on the floor.
- ➤ Mushroom Village: Towering mushrooms and fungal hovels; includes a trading post and overhead mushroom fronds.
- ➤ Goldander's Mine: Vertical pit mine disturbed a demon; rubble covers the pit, with fiery glow below.
- ➤ Throrgrar Chasm: Dark stone chasm with howling winds; features magic singularity with complex runes.
- ➤ Dark Outpost: Reinforced watchtower on an underground lake; includes an interrogation room and observation summit.
- ➤ Sword Spider Nest: Cave network with fungus, webs, and a scythe-limbed beast; shrine with treasure in back.


All maps contain walling, dynamic lighting, local sounds, and canopies where relevant to a map. Many of our map packs contain third-party modules to add additional tactics and dynamic play, these include:
![]() Levels allows instant transitions between floors, or moving your token on top of canopies, creating vertical elevation on a map! |
![]() Mass Edit allows drag-and-drop pre-fab buildings and modular dungeons, as well as helping create dynamic environment changes! |
![]() Tile Scroll lets us create moving tiles and canopies, adding scrolling or rotation to static images to create more dynamic animated maps! |

![]() |
*This module is currently updated and supported for the indicated version of Foundry VTT. This module will be updated to the latest stable version of Foundry after supporting third party modules are updated. This module is compatible with earlier versions of Foundry, but requires manual installation of older versions of any third party module dependencies. |
If you have any questions regarding this module pack, or want to join the MAD community, you can join our Discord server!