- Moderate-sized cave system with numerous encounters of level 23-26.
- Bosses (level 27) are very rare in the solo version; roughly 1 in 5 chance for each boss.
- Located at the sharp turn in the dry riverbed near Village of Thundermist. (550, 180)
- A small bump on the ground that highlights with your mouse with the words "A Sink Hole".
- The entrance moves around this part of the riverbed each time it is used.
- The Under Rumbler (level 27) - at bottom end of tunnels
- (need name) (level 26) - at the righthand dead-end