The hillfort of Šilėnų, also known as Aštrusis kalnas, is located in a pine forest in the territory of Birštonas, near the village of Šilėnai. To reach the site, one can travel from Nemajūnai via a gravel road, turning near a metal cross on Sodų street to follow a path along the edge of a field. The hillfort is separated from the open field by about 100 metres of thick spruce in a sloping landscape.
The hillfort is situated on a separate elongated elevation. The clearing is rectangular, measuring 41 metres long, with a southern width of 10 metres and a northern width of 8 metres. At the northern end, an 11-metre wide embankment has been filled to a height of 0.5 metres. A ditch protects the southern part of the clearing, while the surrounding slopes rise to a height of 12 metres.
Research conducted by the Institute of History in 1971 dates the hillfort to the first millennium. It was officially declared a cultural monument in 1998. The protected territory covers an area of 9,200 square metres.
Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons
Written by Nicolo Ciampini
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