On the summit of the cliffs between Deal and Folkestone the early spider orchid occurs in large numbers, as well as the rare oxtongue broomrape. Naturally exposed chalk is rare inland with the exception of the river cliffs formed by the River Mole on the west face of Box Hill and at Ham Bank in Norbury Park. However, quarry lakes within chalk pits provide habitats for great crested newt. The scarce musk orchid has colonised disused chalk pits near Hollingbourne in Kent.
