Free images results:
 

Pebble pictures, stock photos and images

 
1


 
Riverbed Stock Photos
Author: Jas0420
Stones Royalty Free Stock Image
Author: Clarita
Pebbles Stock Photography
Author: Ichtor
Old Town Stock Image
Author: Allein
 
1


 
Also, here are some commercial RF-licensed images that match your search criteria: