The Super Unicorn Brothers
It was a passageway between the dauna mines and mt levett, which further led to the mcneil village, the mayor of the village being one of the employers on the unicorn brothers' boss' bankroll.
Breath of Fire III: Rei's Heat
Since any other route would have taken the young dragon to either mcneil village or out into the open ryu chose the only route that wouldn't end in innocent life lost.