How to communicate that an image is clickable without explicitly telling that it's clickable?

1. How do you indicate something is a hyperlink?

How do you indicate something is a hyperlink?

The traditional cue for hyperlinks is blue text, like we're using here. And buttons, like their real-world counterparts, are rectangular, and have a 3-D appearance. These conventions provide the strongest perceived affordance of clickabilty and in early years we recommended that buttons and links follow these patterns.