Underkeep Foundations
It All Started…
Long before the towers rose… before the streets were laid…
there were the foundations.
The Underkeep Foundations are not merely stone and structure — they are the first marks of those who build below. Carved with purpose, set with precision, these ancient forms define the hidden world beneath the surface.
Each corridor, each junction, each chamber is part of a greater design — one that grows, expands, and adapts as the Underkeep reveals itself. What begins as a simple passage may become a labyrinth. What starts as a chamber may become a sanctum.
Those who build here do not simply create dungeons…
they shape what lies beneath civilisation itself.
Lay your first stones.
And begin the descent.
51 STL Files
Works Perfectly With The Rat Warrens Bundle
The Underkeep Foundations pair perfectly with the Rat Warrens, allowing you to extend your dungeon into a tangled network of hidden sewage tunnels and crawlspaces.
Behind grates and hinged openings, the Warrens connect seamlessly into your Foundations layout — adding depth, danger, and a sense that something is always moving just out of sight. Whether used as secret routes, escape paths, or lurking threats beneath the stone, they bring your Underkeep to life in ways your players won’t expect.