Paper maps and map books still exist, and they’re pretty useful for navigation. If you stay at hotels, they usually give you some simple maps of the area with the most important features highlighted.

If you still want to use online maps, OSM (Open Street Maps) is a great project that doesn’t depend on any big tech maps. It also works completely offline if your frontend allows downloading maps. CoMaps is a good client for phones. You can contribute to OSM yourself if you miss anything.