Underground Kingdom
The temperature here was a little higher, about two or three degrees. The tunnels and halls paved with rocks and perfectly rectangular slabs were gone, replaced by a cavern stretching as far as the eye could see. An ashy forest similar to the one on the surface ran as far as the eye could see along with a few hills and mountains.
As Jake levitated high into the air, he saw a black opaque lake the size of a small town with dark plumes of smoke billowing from the surface that did not bode well. There were also several wide trails and dirt roads whose packed earth and deep furrows made it clear that they were frequently trodden upon by bipedal creatures and carriages of all kinds.