South Dakota Tourism shows a landscape at Badlands National Park, S.D.

** FILE ** In this July 18, 2006 file photo, Mount Rushmore National Memorial is shown near Keystone, S.D.

FILE ** In this July 22, 2005 file photo, the freshly cleaned faces of South Dakota's Mount Rushmore National Memorial bask in the early morning sun as the moon sets in the distance.

This undated photo released by South Dakota Tourism shows a landscape at Badlands National Park, S.D.

This undated photo released by South Dakota Tourism shows a hiker at Badlands National Park, S.D.

This undated photo released by South Dakota Tourism shows people viewing the fossilized remains of mammoths at the Mammoth Site of Hot Springs in Hot Springs, S.D.

Fail In this Sept. 21, 2005 file photo, Crazy Horse Memorial is shown in Crazy Horse, S.D.

** FILE ** In this Sept. 21, 2005 file photo, Crazy Horse Memorial is shown in Crazy Horse, S.D.

**FILE** In this April 22, 2008 file photo, the Crazy Horse mountain memorial is seen in the Black Hills of South Dakota.