"Kaliszak" is a forest nature reserve, located in the commune of Janów. The purpose of creating this small protected area was to preserve the natural mixed forest of fir-pine with addition of other trees. The indigenous stand is from 100 to 160 years old. There are protected species of plants and animals. The area of the reserve is part of the Złotopotocka Refugium, established within the Natura 2000 network.