🇸🇪 Sweden · Megalith
Ales Stones – Kåseberga Stone Ship
Late Iron Age Vendel–Viking transition · Scandinavian Late Vendel to Viking (pre-Christian)
59-stone 67-m Viking Age stone ship aligned solstitially over the Baltic at Kåseberga.
🇸🇪 Sweden · Earthwork
Eketorp Ringfort — Öland
Iron Age to Medieval (c.400–1300 CE) · Scandinavian Migration/Vendel and Medieval Gotlandic–Swedish
Eketorp, on southeastern Öland's Stora Alvaret limestone plain, is the only fully excavated of Öland's 19 Iron Age ringforts, a concentric limestone-walled fortress 70 m diameter with 53…
🇸🇪 Sweden · Earthwork
Bulverket Lake Fortress (Tingstäde Träsk, Gotland)
Early Middle Ages (c.1120–1150 CE) · Medieval Gotlandic
Massive 1130s timber platform fortress in Tingstäde Träsk lake, Gotland: 170 × 170 m square bulwark of ca. 25,000 pine logs forming a square grid with causeway to shore.
🇸🇪 Sweden · Earthwork
Stavgard Ringfort (Gotland)
Migration Period to Vendel Period (c.400–800 CE) · Gotlandic Iron Age
Pre-Viking ringfort (fornborg) on Gotland's southeast, circular limestone wall 80–100 m diameter enclosing 0.5 ha, with inner house terraces and Iron Age ceramics.
🇸🇪 Sweden · Earthwork
Torsburgen Hillfort (Gotland)
Early Iron Age to Viking Age (c.300 BCE–1100 CE) · Gotlandic Iron Age / Viking Age
Largest hillfort in Scandinavia at 1.2 km² plateau fortified by 2 km limestone wall across the narrow neck of a 67 m high limestone plateau.