Free images results:

Bars pictures, stock photos and images


Old window Stock Photography
Author: Judy
Sundial Royalty Free Stock Image
Author: Fmahia
Step Stock Photos
Author: Grandmaisonc

Also, here are some commercial RF-licensed images that match your search criteria:  
Behind bars Stock Photos
Author: Looby

Explore more commercial options: More Bars Stock Illustrations & Vectors | More Bars Stock Video Footage