Bolshoi Zayatsky is a small island belonging to the Solovetsky archipelago in the Onega Bay of the White Sea, in Russia. The island is home to about 13 or 14 mysterious labyrinths as well as more than 850 heaps of boulders and numerous other stone settings such as a stone symbol with radial spokes, possibly representing the sun. The locals call them "vavilons".

The labyrinths are constructed from local boulders set in rows on the ground in the form of spirals. Often there are two spirals set one into another, which has been likened to "two serpents with their heads in the middle looking at each other". Intermittently along the spiral there are thicker or wider heaps of stones; the ends of the spirals are also wider. Each labyrinth has only one entrance which also serve as the exit. The smallest labyrinth measures around six meters in diameter, with the largest being 25.4 meters across.

Photo credit: Weird Russia