[Micah]

The terrain modifier doesn't account for the full chance of a site. I ran a test game with 0 sites and still found some in plains and farmlands. (It was on Glory of the Gods, in case there might have been some sort of "high magic" tags lurking around under the terrain type. I didn't check that thoroughly, although the sites weren't in any conspicuous locations like standing stone icons or the ends of peninsulas or the like, they just seemed randomly spread.)