Kannabi Bridge was an important transportation hub in the Land of Earth, bustling with people every day.
Some distance away stood a valley.
Compared to Kannabi Bridge, this valley was rarely visited. There were few trees around it, and the entire mountainside was completely bare.
If one entered the valley, they would find the fossilized skeleton of a large dinosaur, half buried in the earth and half exposed to the air.
The very presence of dinosaur fossils showed just how desolate and primitive this place was.
Yet this undeveloped valley was far from picturesque. Instead, it carried a faintly eerie air.
It felt like entering a chilly graveyard.
That feeling was not wrong. Strictly speaking, this valley was a tomb, and deep beneath the ground lay... Uchiha Madara.
At some point, a small white snake slithered into the valley, then burrowed into the soil beneath the dinosaur skeleton.
The white snake continued digging downward and soon reached a layer of rock.
It was precisely this rock layer that had made the place so barren, preventing plants from growing and people from settling here.
But this rock layer was nothing to the white snake, because it had once contained an exit that had merely been deliberately concealed.
The white snake quickly found the buried passage and slipped down through the cracks in the rock.
After an unknown amount of time, the rubble finally vanished from before it. The space suddenly opened up, revealing a sloping tunnel tall enough for a person, with stone steps carved from bluestone along its length.
It was clear that the steps had originally extended much farther, but the section near the exit had been destroyed.
The presence of such a man-made structure this deep underground was obviously unnatural.
Yet no one had discovered it all these