ICONS on the MAP???

[Edi]

Gandalf Parker said:
Actually I think that the "eye-candy" can have a function also if it was a map generated in Dom3. The map file does mark certain terrains as prime for certain magic sites, and the eyecandy such as the volcano or monolith will often match up to those sites.

That's the best explanation I've seen so far. I've never used those special terrain types, so I don't know and I've never seen them. Time to give it a try, I think...