The City of Snow Monsters

"Stop!" Jacob quickly stopped Geko from thrusting his spear because he could feel strong movements once Geko opened that hole. He quickly moved toward the hole and looked through it, and his eyes dilated in surprise. 

"What's here?" Charlotte curiously asked since she could also hear large movements behind that hole; furthermore, the air on the other side was extremely freezing and strange. 

Jacob moved back and sternly said, "See for yourself." 

"Don't mind if I do." Charlotte quickly approached the hole, and when she looked through it, she was stunned, "Are you kidding me?" She muttered in stupefaction. 

On the other side of this ice wall was a massive underground city built with nothing but ice, and thousands of snow monsters, big or small, were wandering in that city.