[Credit and Copyright: J.C. Canonne, P. Bernhard, D. Chaplain & L. Bourgon]
I’ve looked and looked.. not seeing an elephant’s trunk. Cool pics though...
The lines of celestial latitude run vertically, and that's 57.5 degrees north down the middle, bracketed by 57 and 58 degrees. The big green circle is part of the Starry Night display, and marks the Elephant's Trunk region.