The caves
were formed in a belt of limestone that dates back 440 million years. It
is around 1.5 kilometres (1 mile) wide and 14
kilometres (8.7 miles) long.
There are an
estimated 60 caves in the area and four are open to the public.
The name "Yarrangobilly" is a combination of the Wiradjuri words "yirra" meaning teeth and "bila" meaning river.
The teeth is a reference to the stalactites and
stalagmites in the caves and the bila refers to the rivers and creeks in the
area.
