This is the Siberian Plateau.
it have no people .
One day,
a large hole in the ground,
Humans of ancient civilizations living in the heart of the earth,
Driving a flying saucer,
Fly out.
這是西伯利亞高原,
這裡人煙罕至,
某日,
地表裂出一個大洞,
生活在地心處的上古文明的人類,
駕駛著飛碟,
飛了出來.
thanks for your description @cloudblade