The mountain where the Raven camp was established was discovered by the third family head of the Ravenstein family. The mountain held great sentimental value for the family.
It had no remarkable features, there were no ancient dragons sealed within, nor were there any overpowered treasures to be found. Even the mana surrounding the mountain was subpar at best; without any external influence.
So, why did the next generation of Ravensteins receive their training there?
The reason was simple: it was where the first Paragon rank of the Ravenstein family had emerged. During that time, the Ravenstein family had etched their name into the history of the human domain as one of its rulers.
Since then, the Ravenstein family had been faithfully maintaining the mountain, considering it an integral part of their heritage.