Looking at the walls on both sides in amazement, I began to understand why the Japanese had found this place, which was definitely not a simple river now.

"It's almost there." The middle-aged man gently poked the mural on the wall with a bamboo pole, and a large area of "whoosh" fell off, but he could still vaguely see that it was a huge arch painted on the mural, and behind the arch there were countless people digging in a tunnel.

The mural depicts the artisan excavation of the waterway, and in ancient times, a large-scale project like this was often used as a direction to preserve the process.

"What civilization has this written down this pattern?" I asked curiously.

That's not ancient petroglyphs

Chapter 96 of "Strange Tales of Yin Mountain", artificial traces are being hit by hand, please wait a while,

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