I've been reading about this since I was little. Imagine over 200 years ago, the ingenutity of a group of people that could engineer such a site. That this was built with probably nothing more than shovels, ropes, and pullies. Fascinating.
I would imagine that this will remain a mystery until someone with bottomless pockets(A Richard Branson type) swoops in and gets it done, no matter the cost. $15million to dig a hole? Bah, pocket change.
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