The waterfall cave was a cavern located on the Jedi homeworld of Tython. In 3643 BBY, Qyzen Fess went to search for Nalen Raloch in order to help Yuon Par and her Jedi padawan in the cave, but was captured by an overwhelming amount of enemies. After a short while, the Padawan was sent to search for him. After rescuing Fess, the Trandoshan traveled along with the Padawan to the Fount of Rajivari.
Star Wars: The Old Republic (First appearance)