The Warrumbungle National Park forms an extensive and spectacular geomorphological site, and the bold volcanic landforms are unrivalled anywhere else in Australia. The landscape of spires, domes, plugs and dykes is uncommon in Australia, and the sharp rise of the landform from the surrounding plain to heights of more than 700 metres contributes to the aesthetic drama. The Warrumbungles represent one of the best examples of a number of central shield volcanoes along the east coast of Australia, and have a wide array of outstanding volcanic features, including domes, plugs, dykes, sills, lava-flows, tuff layers, and horizontal and vertical columns. Some of the spectacular and well-known volcanic features of the Warrumbungles include the Breadknife, a narrow 90 metre high dyke that stretches for half a kilometre; Bluff Mountain, a trachyte dome with a near-vertical face 250 metres high, and Belougery Spire, a plug that illustrates horizontal trachyte columns. The Warrumbungles are in a transition zone between the arid western and wetter coastal zones, and are of significance as a refugium in inland south-east Australia that supports exceptionally high numbers of species when compared to most other inland places in southern Australia.