Ekphrasis is from Greek meaning the description of a work of art as a rhetorical device. That's actually pretty straight forward, but another way to look at it, is it's highfalutin fan fiction, usually about paintings or pieces of music, but it can be about virtually anything.
Today's artwork is...
The Grand Canyon by David Muench
The perspective opportunity for this one is great. The cameraman watching the person watching the river which is partially occluded (and maybe hiding another perspective that is unseen in this photo). Also a great opportunity to work with description. If you're having a hard time figuring out where to start, try to be as descriptive as you can without using an overload of adjectives.