Siberia West 4, Earth West 4, was a low earth footprint. It was the location of a secret Black Corporation facility, where the first twain, the Mark Twain was built and launched from.
This version of Siberia was 2 degrees warmer, for an unknown reason. This area of this world was covered in pine woodland.[1]
The Long Earth[]
Joshua Valienté came here in 2030, before the Journey, and was greeted by a Russian woman and a man. It was raining. He was directed to follow a line of orange markers to the construction site of the Mark Twain, where it floated, teathered to the ground by wires, in the middle of a clearing. He met another man here, who took him up an elevator into the airship.[1]