Background Noise of the Tomb Raider ALDWYCH

Hello,

About the Background Noise/Sounds of the "Tomb Raider 3" Game level ALDWYCH

in the first 30 seconds are a strange Noise (vague squeak)
for 2 Times hear a rolling of Railway Carriages.

and in between the sound of the wind!

does somebody know where the sounds originate?

Here are the Sound:
www.uploadarea.de/files/ntgtvsgnw87fha79jwld37ndk.mp3

regards

Deltic