At first, it seemed like a waterfall. But in actuality, it was actually a river traversing a gentle slope. It traversed along the walls of the Tertiary Landmass, making a spiral spanning ten kilometers in diameter until it reached the bottom, connecting to a lake.
As for the water quantity, there seemed to be an outlet like a selectively permeable membrane similar to the one in his Secondary Landmass that sent out the excess water into the ocean. This way, it prevented the Tertiary Landmass from drowning.
The water currents were slow. As the slope was gentle, his ship moved at a slow pace. Krune sat on the ship and used the opportunity to look at the Tertiary Landmass, admiring the breath-taking view.
There was a sea of clouds at the top that were constantly moving, showering rain at times. Then again, not all clouds were rain clouds. There were clouds that simply emitted sunlight, keeping the place bright.