Sandhöhlen, Sand caves and architectural heritage monument in Blankenburg, Germany.
Sandhöhlen are two underground caves beneath Regenstein fortress, formed through centuries of sand extraction. The Great Sand Cave and Small Sand Cave lie in a wooded area and still display the mining structures from that period.
The caves developed over centuries through sand extraction, which was an important building material for the region. Archaeological evidence suggests the site may have held significance in Germanic times.
The caves take their names from the sand extraction that shaped them, and visitors can still see the marks of this craft on the walls and ceilings. The site reflects how important this raw material was for local communities and their daily work.
The caves are accessible via a marked walking trail and lie in a forested area with natural shade. This location is part of the Harzer Wandernadel hiking network and works well as a stop during a hike in the area.
The caves display different extraction techniques on their walls, showing how workers obtained sand from the rock over long periods. These marks offer a direct look at craft methods that are rarely seen elsewhere.
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