Alex appeared just outside a forest. He was already inside the goblins hub, the home of goblins that ranged up to rank 4. The forest had trees that made canopies and blocked most of the light from reaching the ground. As a result, the ground had no other plants growing apart from the trees.
It was just around noon inside the dungeon. Time ran differently in the dungeon compared to the real world. The reason to this, nobody knew but they could make an estimation by themselves. The dungeon was a world of its own and followed different rules.
As for how big the goblins hub was, it couldn't be estimated. The reason being that nobody had ever covered it all as the teleportations were always random but for all cases, everyone was always teleported to the outer region of goblins hub. The dangers that were involved inside couldn't allow people to go exploration randomly due to the creatures that could be found inside the dungeon.