Google My Maps

Google My Maps is a custom map service offered by Google. My Maps allows you create your own maps containing features that are of interest to you.

How to find custom maps

This not quite so easy. You may find a map that a Google user has produced when making a search but there is no search function within Google MyMaps. There is an option to "share" your maps but this only provides you with a URL that you can send to whom you wish to share.