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Jiumenkou tunnel

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  • #31
    Re: Jiumenkou tunnel

    [QUOTE=Kim;12880]There's another tunnel entrance here: 40
    chinoook's 1st law: Structurally weak walls tend to have double structures.
    chinoook's 2nd law: Newer walls are built next older walls, not over them.
    chinoook's 3rd law: Similar problems lead to similar solutions.

    The most dangerous worldview is the worldview of people, who have not viewed the world. (Alexander von Humboldt (1769-1859), German naturalist and explorer)

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    • #32
      Re: Jiumenkou tunnel

      Originally posted by chinoook View Post
      ... and was already contained in our map ;-).


      -chinoook
      Yes I saw that, but we didn't have a photo in the forum

      I must have passed that entrance at least four times without realizing the importance of it

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