This is the world where random generation gave me both a river and a volcano on the same embark site, with no hostile neighbors of note. It's a very safe, boring world. Until I regenned the seed with a few more years, and a tower popped up. It's not there on my original, nor did it appear when I did a third regen as an experiment, so I'm uploading the map itself in case anyone's interested.

Link goes to the forum post with location details and the full worldgen parameters.