Good work. I really dig the old-school-ness and the overall design. The ancient ruins hinting at alien shapes is pretty cool.

Small issue: The callouts (text label areas) don't seem to be working with the rest of it for me. I think it is the clean white vs. all the yellows and browns of the map itself.
Are you going to show a player version, and a DM/GM version? If so the labels are not such a big deal as I expect they are for your eyes only...