Google has added some new layers to Google Earth. The new layers are part of what is now called the “Geographic Web.”
The Geographic Web is a mashup of content from Wikipedia, the Google Earth Community, and Panoramio, a geographical photo sharing site. As you zoom into a specific location, you can see place marks of points of interest, user-generated photos, and selected Wikipedia articles. Hopefully it will remain uncluttered as content fills in but it appears that Google is only using select information in the Geographic Web from the three user-generated feeds.