The coastline in the park is a Special Area of Conservation. The area starts at Llŷn Peninsula and goes down the coast. There are sand dunes located in the special area. The park has trees. They are a mix of different types of deciduous trees. The tree seen the most in the park is the Welsh Oak. Birch, ash, mountain-ash and hazel trees are also found in the park. There are coniferous forests that have been planted by people. These forests include Gwydir Forest. These forests used to be harvested for wood. Now they grow without people cutting down the trees. 