Content items, such as e-books, audio files, video files, and the like, may be tagged as associated with a location based on observing the locations at which users access the content items. A rich set of tag data may be gathered by additionally observing such things as the date and time when users access the content items as well as allowing the users to tag the content items with comments or ratings. A fine granularity of tagging may be achieved by associating the tags with specific portions of the content items. Content recommendations based on the tags may be provided to other users when those users are in approximately the same location.