Mystery metal monolith pops up, this time in Poland December 10, 2020 at 06:11PM

A mysterious metal monolith has popped up on a riverbank in the Polish capital Warsaw, the latest in a string of similar objects that have recently appeared in Europe and the US. ​​Joggers noticed the triangular pillar during their morning run along the Vistula river, according to local media reports. It stands some three metres (10 feet) tall, has a dull silver-coloured surface, is held together by screws and is planted in the sand of the riverbank near a major bridge.