This one is entitled 'Island Dreams' by Jim Warren. It is an illusion of a different type. The roaring waters and silent grandeur seem to become a part of you, as the women's hair becomes part of the waterfall.
"We may all be netted together" - Darwin. This picture is a great way to illustrate and explain the relations/interactions within all animals. Does not necessarily relate to sexual selection, but a good representation of all Darwin theorized of.