In 2005, a memorial was put up near the small town of Emilcin, Poland consisting of a metal cube balanced on top of a a rock. It commemorates the most famous alleged UFO abduction case in Polish history, that of Jan Wolski, which was said to have taken place on May 10, 1978.

While the the little green men who nabbed Wolski were apparently advanced enough to travel across the universe in a hovering white craft, they weren’t above giving him the standard “dress down” and instrument probe.

The memorial to Wolski’s experience was put up by the Nautilus Foundation, a Warsaw-based organization that “investigates” UFO incidents.