There are several maps in the Dungeon Master's Guide:
- a hex map of Daggerford and surroundings on page 14
- a map of the elemental planes on page 57
- a sample dungeon map on page 103
- a beautiful town map on page 115
- a tactical map in the image on page 243
- another map in a drawing on page 261
Including several maps from Appendix C:
- a windmill and a house map on page 310
- a dungeon map on page 311
- another dungeon map on page 312
- a multi-island coastal town map on page 313
- a costal map with a bridge on page 313
- a cave system map on page 314
- a ship map on page 314
- a chasm/dungeon map on page 315
What are the origins of these maps? Do they have a prior history or associated adventures?