62.6350°N, 17.9350°E.
Trojaborg vid Snöan, Härnösand is a prehistoric or medieval stone-formation labyrinth in Ångermanland, Sweden. The design is a classical 11circuit layout with 11 circuits, 12 walls, approximately 15 metres in diameter, built of stone. Documented age: 15th-16th century (15th-16th century). Current condition: intact. A large stone labyrinth near Härnösand on Sweden's High Coast — a UNESCO World Heritage Site recognized for the world's highest documented post-glacial land uplift (285 meters). Documentation sources: Kraft 1983. A figure that resolves into a single unbroken line when traced from edge to centre and back. 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.