C817 Just where is this?

Everyone rushed to the front of the huge fissure excitedly. At this time, the fissure was about two meters wide, and when they looked down, they saw a long staircase. The staircase was very long and wide, so they guessed that it shouldn't be a problem for hundreds of people to enter the fissure at the same time.

Rumble ~! Kacha ~! Accompanied by two booms and violent vibrations