[Norfleet]

Originally posted by Minrhael:
I assume based on the fact that I usually find nature gems in forests and air in mountains etc that the sites are at least to a degree terrain-linked.

Sites aren't really terrain linked. You've been finding nature in forests and air in mountains because you simply find more stuff, PERIOD, in forests and mountains. Plains and rivers are lower in magical sites, so you should stick to searching mountains, forests, wastes, etc.