An atlas of Earth’s mysterious places — megaliths, pyramids, lost and sunken cities — with the evidence shown plainly: what is verified, what is contested, and what is still unknown.

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Timber platforms tagged “timber”

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🇸🇪 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.