Strange construction puzzle

Sometimes during my walks I see constructions that I have no idea of their purpose. That puzzles me, if I have time, especially that they are in a strange places. Like in this case, the middle of a small square in the middle of the city. Ventilation? Does that mean there are underground tunnels? Anyway nice exercise for the imagination 🙂



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3 comments
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That is really interesting,Sometimes these mysterious structures make you wonder what is going on beneath the surface. Great observation.

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