zh84 [2016-10-20 17:58:53 +0000 UTC]
This makes me think of Greg Bear's "Eon" and "Eternity", part of which is set in a tube-shaped universe which has a beginning (attached to a human space station) but no end. The further you travel down it, the stranger it gets. I suspect that this is a part of "the Way" that has been colonised by non-humans.
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