The outer part of the ruins was a desolate city. This city was super large with its size being equivalent to a planet. But most of the structures of the city were already destroyed and only a very few were standing till now.
This portion of the ruins were almost completely excavated and there were not much dangers to be found. The true hard part of this ruins would begin after Elena would go to the second layer of the ruins.
Yes, this whole place was divided into 9 layers. The outermost layer was the largest one but was also the poorest one of them all. And the last 1st layer was the smallest but also the most luxurious one among all the layers.
Elena needed to reach the core of the 1st layer in order to find the remains of the Royal Rihona. She also had not used any of her OP abilities to find the perfect path to that place, so at first she needed to find the gate to the second layer.