Lifelogging is the act of recording some aspect of your life in digital format. A basic and common form of lifelogging is the creation and maintenance of blogs, which are typically textual in nature, though often with multimedia elements. In this paper we are concerned with visual lifelogging, a new form of lifelogging based on the passive capture of photos of a person's experiences. We examine the nature of visual lifelogs, and the differences between visual lifelog photos and explicitly captured digital photos. This is done by examining a million lifelog photos encompassing a year of a visual lifelog from the life of one individual. © 2008 Springer-Verlag Berlin Heidelberg.