I haven't participated in a Cartographers' Guild Map Challenge in an age, so this month's challenge was create a race track map. So I decided to create "Mad Max Moto Cross", a post-apocalyptic urban track arena where armed riders compete to win, while tower-mounted ballista turrets periodically fire at passing riders. There is an audience stand, toxic water hazard, dirt track and moguls, broken pavement and a building with a partially collapsed floor riders must negotiate and use ramps to enter and exit the structure.
Also this map could work as a survivor community defense fort or used by a marauding gang.
It is now a PDF product ready for sale at DTRPG. Product includes a single page gazetteer, followed by 35 letter size slices of gridded map, 4 each 24 inch tiles of gridded map, 4 each 24 inch tiles (no grid), and a full 48 inch full map no grid ready for VT-use for $2.99.