Half of the group of heroes in Of Stars and Swords has journeyed into a fairly standard fantasy location: underground tunnels and roads. For reference, the scene at the waypoint begins here, Issue 3 - Page 5.
The location where most of the action would take place was a waypoint, like a small village between cities to provide a place for travelers to rest. For reference, one of the first things Caroline did was to put together a nice little overhead view of the waypoint so we knew the area.
Overall, it's really just a simple crossroads with buildings carved into the four corners. So it didn't get too boring, we put a huge column in the center, carved with runes as a road sign of sorts. You can see the height and shape of the column at the bottom of this page of sketches.
We also didn't want things to just be boring rock and columns, so Caroline and I talked things over a little bit, and then she went crazy designing creatures of various kinds and tons of plant life for the environment. The sad thing is, a lot of these little guys we just don't have a chance to show, but it helped to get a feel for what the underground world is like.