31. Gosses Bluff, Northern Territory, Australia
This highly eroded structure is situated just south of the MacDonnell Ranges (left part of the picture) in the arid Missionary Plain in the Northern Territories, Australia. Although it could be mistaken for the crater rim, the central ring of hills (5–6 kilometers in diameter) results from differential erosion of the central uplift within this large complex crater. The rim itself has been eroded and is no longer visible, but the circular, grayish drainage system outside the inner ring of hills probably marks the original extent of the structure before erosion. North is to the left.
Space shuttle image STS41D-41-028.