Blauenthaler Wasserfall, Artificial waterfall in Eibenstock, Germany.

Blauenthaler Wasserfall is a roughly 30-metre waterfall in the Bockau valley near Blauenthal, fed not by a stream but by an artificial ditch. Its water pours over a rock wall built of stacked granite blocks. The ditch, lined with natural stone, runs about 3 km from the Höllengrund before reaching the site.

Around 1530 the Nuremberg sheet-metal dealer Andres Blaw bought the site of a former grinding and saw mill and turned it into a hammer works. After World War I, Kommerzienrat Toelle had a 3 km masonry ditch dug from the Kleine Bockau in the Höllengrund, crossing the Große Bockau, to drive the turbines of his wood-pulp mill supplying the Langenbach paper factory. Sluices let the water be diverted over the granite wall on Sundays and holidays, and since the mill closed the fall has run permanently.

The waterfall owes its existence to Kommerzienrat Toelle, owner of the Parkhotel Forelle, who had sluices built so that water from his wood-pulping plant's ditch could be diverted over the granite wall on Sundays and holidays when the machines stood still. Since the pulping works closed, the fall has run permanently and become a tourist attraction.

The site is accessible via several hiking trails of varying difficulty levels that lead to different viewpoints. Visitors should wear sturdy footwear and be prepared for potentially slippery ground, especially near the water.

During colder months, the waterfall freezes into a solid sheet of ice that attracts ice climbers from across the region. This transformation makes winter visits a completely different experience from any other time of year.