Carbus' Fitedra is a beautiful map, with a great palette and a very distinctive feel to it.
I personally loved Djekspek's Going Down, I think it has a great aesthetic as well as capturing the essence of this month's challenge.
Domino's Land of Sorrow was a very interesting interpretation of "hell," and the incorporation of text was very well done (I think the font was really nice, whoever chose it was very smart... )
With Hell: The Eternal Soul Grinder, Slylock made some great design choices, as well as having an interesting backstory to his map. It's a shame it didn't get finished in time.