For some odd reason, Lex had assumed that when he traveled through the opening to the other realm, which existed in the form of a horizontal massive tear which swallowed up the top of the mountain, he would appear from the ground from where he would be able to see the rest of the mountain tip rising. That was not the case.
They flew into the opening, and what awaited them was a desolate wasteland without the slightest hint of life even though the realm itself was abundant with energy. When they appeared inside the realm, they were standing atop an ancient formation - one which operated using concepts Lex was entirely unfamiliar with.
To be clear, the formation wasn't actually active - that was merely where they randomly appeared once they entered the realm. Signs of age had made themselves apparent on every structure around them, whether it was the floor or the walls or the very fabric of space itself.
