An uncanny depiction of a massive human skull set in the side of an icy cliff. How did it get there, and what does it contain?

This map was an exercise with some new pens. The thick lines made drawing easy, but coloring more difficult. Next month I want to try some extra-thin lines to compare.
It took me a long time to find a color scheme that I liked, but I'm glad that I kept meddling. If you'd prefer something warmer, check out the Patron-exclusive tropical variant!
This map serves as a good entrance for any old dungeon or cave map, especially icy ones. Perhaps I will draw a specialized interior? If so, what do you imagine is in there? Let me know in the comments. :)
EDIT: Sam Brown has written another of his excellent map primers. Find the PDF attached, it's great food for the imagination!
Thanks to you, this map is released under the CC BY-NC 4.0 license.
RUNEHAMMER
2019-03-04 05:49:44 +0000 UTCMaxime Durocher
2019-02-28 18:36:59 +0000 UTC