Khan didn't expect the trip to last too long, but the reality turned out to be different.
The night arrived, but no monster showed its presence, allowing Khan to continue his trip peacefully. The warm current eventually brought him to a cave that led to another lake, starting a new underwater journey.
The underwater environment was hard to cross for Khan. He could rely on his sprints, but the tunnels' patterns were odd and went in different directions, bringing him to all sorts of empty underground chambers.
The water was showing Khan the entirety of its underground array. A more straightforward path probably existed, but the warm current wasn't showing it, and he didn't have other tracks to follow.
At times, Khan returned to the surface and picked up the pace, but those moments were random and short. Most of the trip happened underwater, which didn't allow him to cover much ground.