Free images results:
 

Sandstone pictures, stock photos and images

 
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Erosion Stock Photography
Author: Rhouck
Ghost eyes Stock Images
Author: Dnally
Cathedral Rock Royalty Free Stock Photography
Author: F2
Bunker Stock Image
Author: Slidepix
Gateway Stock Photo
Author: Mhd
Towerhouse Stock Image
Author: Tamas
Tower Stock Photography
Author: Mika5
Lizard Royalty Free Stock Photo
Author: Tjbel05
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Sandstone Stock Photography
Author: Clabert