OpenStreetMap
For the past days I have been working on a large shopping center in France. Indoor mapping, 3D mapping, micro-mapping… Lots of big improvements were made and now, the area is nearly perfect!
Overall view of the area on OSM. You can see the detailed greenery and parking aisle numbers even when zooming out. I believe this could be really useful for visitors who parked their car to go shopping, but then forgot where they parked: If they remember the alley number, a quick look at OSM will help!