I had an marvelous idea! Why wouldn't I add an tooltip to my pictures to clarify a bit when and where each photo is taken? Spledid, don't you think?
Well I would love to, except that Blog this feature of Picasa doesn't seem to support neither alt nor title attributes. Oh well, go figure.
Added the title attribute afterwards, wasn't too hard. Now I just have to go through the archive at some point and add the thing to all the posts. At some point. In small batches. Over time.