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One of the mysterious structures was found at a nature reserve in the city of Kielce, while the other was spotted on the banks of a river in the capital, Warsaw
Officials have no explanation as to where the monoliths might have come from
They are just the latest to appear in a puzzling international mystery
The first popped up in the Utah desert on November 18 and since then, structures have appeared in Spain, Belgium, Colombia and other countries
Two mystery monoliths, similar to those that have appeared in the US, Romania and the UK, have now shown up in Poland.