Free images results:
 

Curved pictures, stock photos and images

 
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Car Shot Royalty Free Stock Image
Author: Qmedia
Light post Stock Images
Author: Kurt
Pantheon Royalty Free Stock Photography
Author: Ebe
Mushrooms Stock Image
Author: Meg380
Seagull Stock Photo
Author: Chuew
Seagull Stock Photo
Author: Chuew
Seagull Stock Photography
Author: Chuew
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Curved wall Royalty Free Stock Image
Author: Onion