The park and Lullingstone Castle are a Scheduled Monument,[2] and an area of 66.4-hectare (164-acre) is a biological Site of Special Scientific Interest Kent.

In 1944, during the 2nd World War, a decoy airfield was sited in the park, and Lullingstone Castle was used by the army.

[4] In 1964, Summerhouse Knoll (a grass hill) within the park was dug up by Crayford Archaeological Research Group who found 1st-century pottery.

These include 300 veteran oaks, beeches, hornbeams, ash (Fraxinus), and sweet chestnut trees.

[10] As well as the woodlands, the park has large meadow land areas, with plentiful species of plants within, including orchids and other native wildflowers and butterflies.

[14] Nearby, is the 15th-century Lullingstone Castle and Tom Hart Dyke's World of Garden Plants.

Another entrance is via footpaths through Beechens Wood from Redmans Lane (bordering the park on the south).