File:PSM V62 D475 View of the tunnel entrance by tributary valley.png
![File:PSM V62 D475 View of the tunnel entrance by tributary valley.png](https://upload.wikimedia.org/wikipedia/commons/thumb/5/55/PSM_V62_D475_View_of_the_tunnel_entrance_by_tributary_valley.png/606px-PSM_V62_D475_View_of_the_tunnel_entrance_by_tributary_valley.png?20110823233536)
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