The Lausitzer Seenland (Lusatian Lake District) is a chain of 23 lakes created from former open-pit lignite mines, stretching northeast of Hoyerswerda into Brandenburg. The project is still ongoing — some lakes are only partially filled — but several are already well-developed recreational destinations with beaches, campsites, sailing clubs, and cycle paths along the shore.
The Senftenberger See, Geierswalder See, and Partwitzer See are the closest and most accessible from Hoyerswerda, connected by causeways and a developing network of water taxis and ferries. Swimming is permitted at several beaches; the water warms quickly in summer. Cycling around the lakes on the dedicated paths is one of the most pleasant ways to spend a day here. The Rusty Nail Observation Tower (Rost-Nagel) — a 30-metre Corten steel structure near the lakes — offers a panoramic view across the entire water landscape.