The Shyrack cave resided on the desolate planet of Korriban. Large groups of shyracks lived in this cave. The cave consisted of three separate tunnels and an abyss which was spanned by a small bridge.
A shyrack swarm.
In 3993 BBY, as part of the Great Hunt, Duron Qel-Droma and Shaela Nuur died on the planet, failing to cleanse it of terentateks.
In 3956 BBY, Thalia May and two other renegade Sith students hid there from the Sith Academy but were stopped by a terentatek. Revan came and slew the beast on the bridge so that the three students could escape. He also found the body of Duron Qel-Droma.
Also within the cave was the Tomb of Ludo Kressh, where Meetra Surik entered during her search for the remaining Jedi Masters who survived the Jedi Civil War.