Spider crater

Spider is an impact structure, the deeply eroded remnant of a former impact crater, situated in the Kimberley Region of northern Western Australia, 18 km east of the Mount Barnett Roadhouse on the Gibb River Road. Due to very rugged terrain the site is effectively inaccessible. The name is derived from the visually striking spider-like radiating ridges of quartzite prominently visible from the air or on satellite images.

• http://en.wikipedia.org/wiki/Spider crater