Celestynowski Grąd Reserve – a nature reserve established on the area of 8.35 ha. It is located the municipality of Celestynów, north of Celestynów. It is a forest reserve, partial, with an area of 8.35 hectares. The aim of the reserve is to protect communities of oak and hornbeam with stands of rare and protected plant species. There is a well-preserved part of the deciduous forest here. The area of the reserve is made up of habitats of acidic beech (86.8%) and fresh forest (13.2%), with the prevailing oak (79.3%) and aspen (20.7%). Other species include birch, hornbeam, pine. Particular attention should be given to communities of typical oak and hornbeam with fragments of high oak and hornbeam and rare low oak and hornbeam with Carex brizoides.