Create a custom map that showcases user-generated content by creating a Google My Maps instance.
Now, you can upload a user-generated map by selecting it from your Google Drive or Google Docs account and uploading it to My Maps. You can also add notes and other information to annotate the map.
https://www.google.com/maps/d/viewer?mid=1QALBeNkfgmxPa79LfG1vCQpgYQQ5sVg-