I love the idea of modular micro maps that can connect together, so I've been working on a solo RPG that uses that mechanic. This is a map of floor 13 of the dungeon I'm exploring, constructed from 6 basic room shapes (with a little flexibility to make them join up in some places).

The shapes I use with 1d6 are:

1. Straight hallway
2. L shaped hallway
3. T shaped intersection
4. Four way intersection
5. S shaped hallway
6. Open rectangular room