During the time of the Geonosian rule, much of the planet's architecture was similar in appearance to termite mounds, consisting of domes and buildings built into caverns and rock spires.
-taken from the wookiepedia-
With this in mind, I think its Geonosis
EDIT:
Its definitely Ryloth, cos when you look at http://www.game-monitor.com/search.php? … er=players you can see the map Battle at Ryloth playing on the test server occaisonally
XFire - lastremainingscreenname, In Game Name - FSTest| inund8[FSL]

"Thats today? and is this an april fools?" - Stardestroyersarecool, on getting owned