 A natural amphitheatre is a performance space located in a spot where a steep mountain or a particular rock formation naturally amplifies or echoes sound, making it ideal for musical and theatrical performances.An amphitheatre can be naturally occurring formations which would be ideal for this purpose, even if no theatre has been constructed there.Notable natural amphitheatres include the Drakensberg amphitheatre in South Africa, Slane Castle in Ireland, the Supernatural Amphitheatre in Australia, and the Red Rocks and Gorge amphitheatres in the western United States.