The casino pond that was dammed up in 1861 by the construction of an approximately 300 m long earth wall is probably the most beautiful remaining relic of the mining activity in the former Altenberg and surroundings in the 19th century.
This almost 5 ha large pond was created by the mining company "Vieille Montagne" as a water reservoir for washing the Galmeierze and the resulting deposits can still be seen in the form of piled up heaps that tower over the side of the dam.
Over time, very specific plants have settled there, which occur primarily on soils that contain heavy metals.
It can be assumed that these plants, commonly known as galmeiflora, have shown people the presence of ore-containing soils in the dawn of time.
The casino pond at the confluence of the Tüljebach and Göhl at that time for purely economic reasons presents itself today with its magnificent reed belt and the banks lined with picturesque trees as a scenic gem, both for people looking for relaxation and for a species-rich flora and fauna.
This protected area is a very interesting reflection of the cultural-historical career of a landscape that has always been characterized by mining until the middle of the 20th century.