C170 Cave Full of Crystals

"Yaya, grab the rock. I'll go down and have a look."

She couldn't swim, so she could only grab onto a rock and dived into the water. The river was very clear and you could see everything under the water. There was a small crack under the water, but it was too small. How could he get through?

Coming out of the water, he thought about a small whirlpool in the water