The Cave

In Parallel Hallux there's a pit below some of the rubble that was once the Wizard's Tower. There are hand holds to climb up/down. The pit lets out into a large, underground lake, but there is no safe passage provided from the lowest of the hand holds to the lake itself. However, the cave is plenty large enough to fly in, so who cares?

The lake boasts a large vessel of some sort. Tork seems familiar with its basic operation.