The reserve "Jeleniak-Mikuliny" is located in the district of Koszęcin, near the village of Piłka, within the area of the primeval Świerklaniec-Lubliniec woodland, in the upper reaches of the Mała Panwia river. Most of the area is covered with two shallow, overgrown ponds, which are surrounded by the forest The reserve protects primarily the original bog plants and crane breeding sites. In the reserve, there are also some rare and protected plants, including insectivorous ones.