I like the Map_Nuke
Looks good for random things.
Yes, its basically just slate desert with better textures (in my oppinion) and a big ass hole in the center.
hue hue hue
You can build, just not EVERYWERE... I just don't have pics of flat areas, ie. on map nuke, its basically all flat.
On map creep_valley, it has a flat forest, a flat spawn point and a flat desert. map Tropical Paradise (tropical islands on the BL forum) is underwater is flat. (build a houseboat?)