In Revenge of the Sith, after a wild race through the caves of Utapau, Obi-Wan Kenobi and General Grievous end up on a landing platform further away. At least to me, it appears that the platform is not built by the sinkhole of Pau City, but another smaller one. Is there any reference to what this location is? Is it another Utapauan city or just a secondary sinkhole connected to the capital?
And furthermore, why did Grievous leave the Soulless One there, so far away from the city?