From Halopedia, the Halo wiki
'Kasaan Keep contained cylindrical greenhouses, Rojka's personal residence, and a river running through it, most likely the Astlehich River. It also hosted trees and farmland beyond the central structures. The keep had not been fully developed and completed by the onset of the Carrow Conflict, as Rojka's house was only half built, with the building's columns and courtyard completed.
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