Cherchen tamed us inch by inch. The banks were coming closer and closer, and the slopes grew steeper. We moved on slowly, finding it more and more difficult to scout the coming rifts and rapids. We were looking at satellite images of the river downstream of us with a growing concern: there, at the pictures, the walls were coming so close, no water could be seen from above. That’s when the term “subway” appeared to designate those river passages, and the rapid in a gorge above the first tunnel of “subway” was called “Escalator”.
Feels like a real subway escalator – big gradient drop, something powerful roars underneath, the walls, all dressed in stone, pass by.