Sometimes images repeat themselves when looked at in a certain way, forming patterns.  Sometimes close-ups of ordinary things can make an interesting pattern.  Sometimes it's even hard to identify what the object(s) is(are). 

Mud Doorways, Tamgroute Medina Street, Morocco

Fan Display, Kyoto, Japan

Sydney Opera House Roof Tiles, Sydney, Australia

Kelp and Feathers, China Cove Beach, California

Beach Kelp Tangle, China Cove, California

Rainy Window on Ferryboat, Sydney Opera House, Australia

Ginza Lights (Electronic District) Tokyo, Japan