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Mason initiation well in Sintra, Portugal (lemmy.ca)
submitted 9 months ago by to c/pics@lemmy.world
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The "well" is 27 meters deep with 135 steps. It has 9 levels and a maze of tunnels leading off from the bottom.

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[–] 4 points 9 months ago (3 children)

I was under the impression it called itself an 'underground tower'.

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  • [–] [S] 5 points 9 months ago (2 children)

    I heard it refered to as an inverted tower.

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