After confirming the directions to the Beast Sect Yoze quickly made his way over and was able to see the large multi-story buildings integrated within a large forest. From the information provided to him and what he saw on maps, this forest was the Green Branch Forest.
It was known to hold more than 10 thousand different types of animals and the amount of flora was extremely diverse. Not only that it shared a small connection with the one Grave's region's Grand Lines, The Endless Forest.
The Endless Forest was widely considered to be the hardest Grandline to cross in the Grave Region and widely considered to be impossible. From the stories of countless merchants and martial artists disappearing forever once they step deep inside the forest seemingly never making it to the other side.