The Unnh River was located on Yavin 4, near the Jedi Praxeum, and was named for the Sullustan naturalist Dr'uun Unnh. The river wound its way through the Val'Arnos Jungle, passing the Palace of the Woolamander and the Great Temple. The Temple of the Blueleaf Cluster was located atop the Taurin Delta downstream of the Great Temple. The Yuuzhan Vong built their base along it in 26 ABY.