The Żółwiowe Błota Reserve (“Turtle’s Pond) was founded in 1988 and covers 737.41 ha. It encompasses a very rare phenomenon in the scope of Europe – a double lake: Spólne-Kosaniec Lake and Pereszpa Lake. They are the overgrowing peat bog lakes. In the Reserve there is the only breeding site in Poland of the European pond turtle; there are also beaver colonies where the animals build their lodges. On the Spólne-Kosaniec lakeside there is a lookout tower allowing for observing the wildlife. The Reserve main goal is to protect the largest haven of the European pond turtle in Poland.