Maybe this exists already? If it does not, it just seems like something Google should do. A web site that allows a person to map their travels according to GPS locations or points – see above Google Map that shows a point I took while staying in Rome last month. This would be a great way to share locations with people.
The interface would be a map of the world that would show points and annotations of those points. These points would be tagged/labelled – i.e. restaurant italy rome etc. – and some of the points would be public while others could remain private (friends or family). Then one could search: show me all of the restaurants Ottmar tagged in Rome and their exact locations. And then one could map the easiest way to get there from hotel xyz.
Over time one could view one’s travels as lines across the globe, a different color for every year.