Siuron linnavuori, Iron Age hillfort in Nokia, Finland.
Siuron linnavuori is an Iron Age hillfort in Nokia with stone structures extending several hundred meters along the northern cliff edge. The foundations once supported wooden fortification walls that protected settlements on this elevated terrain.
Archaeological investigations began at the site in 1882, uncovering evidence of Iron Age settlements and defensive structures. These discoveries demonstrated that the hilltop held strategic importance across multiple periods.
The name Pirunportinauke means Devil's Gate Gap and marks the passage between northern and southern cliffs, showing how medieval Christian ideas shaped local names.
Access to the site is mainly from the western side, as industrial development altered the eastern approach over time. Sturdy footwear and some walking time help you explore the full extent of the fortification and enjoy views from the elevated terrain.
The forest surrounding the fortification contains mature trees and hosts specialized bird species like crested tits and tree creepers. This woodland habitat adds a natural character that complements the archaeological remains.
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