One thing I always wanted to do when going on holiday is to track where I go, the places I’ve been, and see how much I’ve travelled around. This is true in particular when going to places where I walk around a lot (Japan stays at the top of the list, also for other reasons that are not related to this post). Something like viewing a map showing where you were, and where did you go, with optional export to KML or GPX to import into other programs like Marble.