Digital archives that include 3D CG models of, for example, art works and archaeological sites are now commonly created for a wide range of purposes. Unlike traditional museums where people can visit in a group, access to digital archives and browsing of their contents are solitary activities. Thus, users cannot as easily gain a deep understanding of the contents and are less likely to truly enjoy the contents. We therefore propose a method to support collaborative experiencing of 3D digital archives related to cultural heritages. To achieve this goal, we developed a system that enables automatic blogging of annotations made to 3D content. The annotations a user makes to the 3D content of archives while “walking” through them are automatically converted into a blog on a web page. Users’ experiences, through annotations expressing their impressions, opinions, suggestions, and so on, are converted into content, which can then be used by subsequent users as a reference or guide when browsing the archives.