57.4700°N, 18.2200°E.
Sodra Hallarna Trojaborg is a prehistoric or medieval stone-formation labyrinth in Gotland Island, Sweden. The design is a classical 7circuit layout with 7 circuits, 8 walls, approximately 10 metres in diameter, built of stone. Documented age: Modern reconstruction (2008) (2008). Current condition: intact. A classical 7-circuit stone labyrinth set within the Sodra Hallarna Nature Reserve on Gotland, Sweden's largest island and one of the Baltic's most archaeologically rich landscapes. Documentation sources: Labyrinth Locator. The labyrinth pattern occurs nowhere in nature; every documented instance traces back to a human hand. The labyrinth is one of several hundred sites of this type catalogued globally; each preserves the same unicursal walking-pattern with regional variation in scale, material, and date.
The labyrinth tradition spans at least 4,000 years of documented practice across northern Europe, the Mediterranean, the British Isles, North America, and the Indian subcontinent.