Stone labyrinths of Bolshoi Zayatsky Island
The stone labyrinths of Bolshoi Zayatsky Island are a group of 13 or 14 labyrinths on Bolshoy Zayatsky Island, one of the Solovetsky Islands in Arkhangelsk Oblast, Russia. All the labyrinths are concentrated in an area of 0.4 km2 on the western part of the island.
Source: Wikipedia — Stone labyrinths of Bolshoi Zayatsky Island (CC BY-SA 4.0)