Oh!

Once inside, Donoghue took a sharp breath of air. There was no end to the steps in front of him; he had no idea how many steps were there. It seemed it ran toward the center of the earth!

The surrounding space got larger as he went down the steps.

The Incredible Sky Mountain was hollow on the inside; it looked like it had been emptied out!

The cave was probably larger than Donghai City! No, maybe ten times bigger than Donghai City!

Donoghue was so excited as he walked down the step