The Altenberger lake is an artificial lake with a surface of about 4 ha located 10 km south of Eisenach in the German state of Thuringia. Since 1950, the lake is surrounded by a camping site and is nowadays visited by numerous campers and tourists.
The lake shores are vegetated and only a very small area contains sand. This has the look of a small beach (although it could also be an artificial beach created by the site owners). As we spent the last weekend there I just took a small sample for the Sand Atlas. The sand is now drying and has a common sandstone-look (not quite characteristic for the area though).