The Untamed Spire is located on Zerus.
The spire serves as a multiplayer map in StarCraft II. The rush distance between starting locations on the map is extremely close. However, you'll start in the same base as your allies, and expanding should be fairly easy to do as well. On this map, developers are hoping for a good mix of teamwork-focused, rush-based plays, as well as expanding while players defend at their ramp.