Ok folks, for problems with this map-- No the ground is not supposed to be black XD! Maybe some of the files didnt completely go thru or something. Maybe try reinstalling the installer? Also -- the portal to the other maps is in the hilltops closer to the left side of the mountains. Its there. There is a cave with a black portal that will take you to other places. You just have to look extremly hard.
Its made that way to make it more realistic. And thanks for all the compliments