Well it's a basic intersected Cavern type of Map that features Caves with Water and some bigger ones with Lava or just barren Rocks...It Also includes a Very tall Surface type of Area with a distorted Sun in the Sky with some Clouds...The Surface is also connected via 3 vertical Tunnels directly to the Caverns itself and has also some shallow Puddlesof water, just like the Caverns do...
It's also very T H I N, however therefore also extremely Huge in Height relative to it's horizontal Size...
An everys Explores dream...if not for the Things lurking in the Darkness and depths of the Caverns... :D