Using Google Earth
From WikiMarion
Create Placemarks
A placemark is displayed as a pushpin or other icon on Google Earth. It can include text or images. To create a placemark, click the pushpin icon above the viewing area.
To embed an image, upload it to WikiMarion or another site. Then create a placemark and insert [nowiki][img]http://wikimarion.org/imageurl.jpg[/img][/nowiki]. You can also use standard HTML, for example: [nowiki] <img src="http://wikimarion.org/imageurl.jpg"/>[/nowiki].