Even though Jason was unsure if the valley and the surrounding mountain ring were only a small dimension, something similar or if there was something behind the mountain ring, he couldn't help but be amazed by what he saw.
The mana density he saw while looking down from the plateau was thick and looked like it was stored within the valley.
From the high mana-concentrated valley center area towards the outskirts, it was easy for Jason to perceive that even the outskirts had a mana density comparable to normal four-star wild zones.
Within the center, Jason saw magnificent yet obsolete structures which were labeled as Ancient ruins.
As such, it was most likely the place with most treasures, as long as the ruins were not completely looted.
Even a single advanced mana device might help humanity to develop their technology further and was as such extremely valuable.