You can use the Take Photo tool in the Whale Island. You can find it on the right part of your screen, the gear buttons:
You will then see this panel. Please notice that you can move your kingdom by clicking outside of the picture frame and dragging the kingdom. You can also zoom in or out by using the Zoom Tools on the right hand-side of the game screen.
After you have taken the picture, you can decide to take another one, or to share it with your friends :)