In April 2008, five thousand people demonstrated in Kruszwica to protect cultural heritage and the nature reserve at Lake Gopło, against the Tomisławice opencast mine, which was due to open in 2009. This was the first protest of its kind in the country's history. Gopło Millennium Park (Nadgoplański Park Tysiąclecia) is protected by the European Union's Natura 2000 program and includes a major bird sanctuary.
