These are 1/60" (30mm) tiles for use with miniatures. You can connect them together to make dungeons.
Print out the pieces you want to build a dungeon. Note that you need to print out the "tile_key" pieces to connect the tiles together.
The .stl files should be usable on a printer.
I added versions of the walls with detailing on the exterior (the "2" versions). Let me know if you like these better.
The .scad files are the sources--they were created using OpenSCAD.
If you find this useful, feel free to let me know.