Arctic Spires

The Arctic Spires are an above-water biome that will be featured in the upcoming expansion.

Description
The concept art displays a frozen landscape with flat ice sheet broken up by huge spires of ice jutting up from the below the ice. It would appear the sea level has dropped since the ice spires formed, as the spires each have a large mass of ice a short way up above the floor, implying that this was once the level that the surrounding ice was at when they formed.