59.6000°N, 23.4800°E.
Viirlaid Island Labyrinth is a prehistoric or medieval stone-formation labyrinth in Viirlaid Island, Estonia. The design is a classical 7circuit layout with 7 circuits, 8 walls, built of stone. Documented age: 16th-17th century (16th-17th century). M. Tallgren in 1925. Viirlaid's isolation — accessible only by boat — has preserved this labyrinth in relative obscurity. Documentation sources: Kraft & Selirand, Caerdroia 23. 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.