🇸🇪 Sweden · Megalith
Visingsö Stone Ship and Graves
Late Iron Age – Viking Age · Late Iron Age / Vendel-Viking Småland
Visingsö island ship settings to 35 m in Lake Vättern — Late Iron Age ships plus mounds in oak woodland grave fields.
🇸🇪 Sweden · Megalith
Ale's Stones
Late Nordic Iron Age (Vendal period) · Late Iron Age Scandinavia (proto-Viking)
67 m Iron Age stone ship of 59 boulders on Baltic ridge near Ystad with solstitial alignments, c.600 CE.
🇩🇰 Denmark · Hillfort
Nonnebakken Viking Ringfort (Odense)
Viking Age (c.980 CE) · Danish Viking Age
Viking ringfort beneath Odense's former castle at Nonnebakken (Nuns' Hill), 120 m diameter with 13 m wide turf rampart, discovered by C14 and magnetometry under Odinstårnet lot.
🇩🇰 Denmark · Hillfort
Aggersborg Viking Ringfort
Viking Age (c.980 CE) · Danish Viking Age
Largest Viking ring fortress (240 m outer diameter, 287 m with moat) on the Limfjord at Aggersborg, enclosing 48 longhouses (32 inside, 16 bailey) — garrison for ~1100 men.
🇩🇰 Denmark · Hillfort
Fyrkat Viking Ringfort
Viking Age (c.980 CE) · Danish Viking Age
Viking ringfort 120 m diameter near Hobro, North Jutland, contemporary with Trelleborg (Harald Bluetooth), with identical four-gate geometry and 16 houses plus a cemetery of 30 graves including wagon…