“Madison Wisconsin 05-04-2015 110” by Richard Hurd is licensed under CC BY 2.0. This photo was cropped to a circle. 

“DSC_8483” by lwtt93 is licensed under CC BY 2.0. This photo was cropped to a circle. 

“Santa Barbara Beach, Santa Barbara, California” by traveljunction is licensed under CC BY-SA 2.0.

“NYC Downtown and Statue of Liberty, Golden Hour” by John Cunniff is licensed under CC BY 2.0. This photo was cropped to a circle. 

“Cocoa Beach FL Sunrise” by Rusty Clark ~ 100K Photos is licensed under CC BY 2.0. This photo was cropped to a circle. 

“Town Lake Boardwalk, Austin TX” by sbmeaper1 is licensed under CC0 1.0. This photo was cropped to a circle. 

“Hawaii” by Erik Cooper is licensed under CC BY 2.0. This photo was cropped to a circle. 

“Denver & Front Range (Colorado, USA) 4” by James St. John is licensed under CC BY 2.0. This photo was cropped to a circle. 

“Postcards: Indiana University, Bloomington” by Ali Eminov is licensed under CC BY-NC 2.0. This photo was cropped to a circle.