Sometimes its what you can't see in an image that draws you in. This sense of intrigue can be created in your photos through the technique of framing.
Framing uses objects in your image to draw attention to the primary subjects. It helps to direct the viewer's attention to a particular subject or point of interest within the photograph. Framing can also create perspective, show depth and give context to an image.
In the sample above, the trunk and branches of a tree are used to frame a bridge. Trees, windows, tunnels and archways are just some of the objects one might use when framing a subject. And although this can be best achieved when creating the original photograph, the same results can be achieved through cropping.