Previously KML files were exclusively the domain of Google Earth, but a part of the Google Earth 4 announcement the other day that I missed was that Google Maps now supports KML files, too. KML, in case you're not up on your acronyms, is an XML format that lets you add data to Google Earth, e.g. locations, annotations, pictures, etc. To pull a KML file into Google Maps, just enter its URL in the main search field. For an example of it in action, check out this national parks tour from the Discovery channel.
[Via Lifehacker]
