What you can find in Maleniec is a unique in Europe technical relic of the past. It’s a steelwork which was rolling steel and manufacturing farming utensils using only the power of water. History of this place reaches XVIII century. It was still used by Nazi during the WW2 but instead of water they used fuel engine to drive machines. Steelwork was closed in 1967 and listed in Registration of Monuments.
I do recommend to visit. For more then 10 visitors they can still switch the machinery on so you can feel how it was in its glory days.
Exact location here.