Two metal monoliths appear in Poland; pics surface
Two mystery monoliths, similar to those that have appeared in the US, Romania and the UK, have now shown up in Poland.
The first was spotted in the southern city of Kielce at the site of a former quarry turned into a nature reserve, while the second was found on the banks of the Vistula river in Warsaw.
They are just the latest to appear in a puzzling international mystery that has so far reached at least nine countries.
Standing at around 9-ft tall, the mystery object at Kielce was discovered on Wednesday morning by an employee at the site.
Andrzej Płonka from Geopark, which now manages the Kadzielnia reserve, told local media: 'On Wednesday morning, our employee discovered a strange monolith in the excavation in Kadzielnia.