Zhao Yu didn't know the exact location of the Second tier campsite or familiar with the Tier 2 region. He only knew that it was located north of their campsite from Hao Yu Wei. As long as he followed this line, he would eventually reach it.
After leaving the camp, Zhao Yu spent less than ten hours to reach the northernmost place he had been to before, about 100 kilometers away from the camp.
Further ahead, there was a river that was hundreds of meters wide. There were terrifying monsters in the river, and the level and number of monsters on the other side of the river increased rapidly. This was also one of the reasons why he did not cross the river to explore on the other side.
To others, this river alone was a huge obstacle. Zhao Yu had vision. With the Super Brain's vision, he could lock onto the monsters 'movements in advance and avoid their route to cross the river safely.