Greetings from the Euranian star cluster.
While no images are known to exist of the Great Nebula of Eurania, the wide variety of available images of other famous planetary nebulae offers suggestions of what it might resemble. Here is a small selection of Great Nebulae, for your viewing pleasure.

Credit: NASA, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA).
Acknowledgment: R. Corradi (Isaac Newton Group of Telescopes, Spain) and Z. Tsvetanov (NASA).

Credit: NASA, NOAO, ESA, the Hubble Helix Nebula Team, M. Meixner (STScI), and T.A. Rector (NRAO).

Credit: NASA, Andrew Fruchter and the ERO Team [Sylvia Baggett (STScI), Richard Hook (ST-ECF), Zoltan Levay (STScI)].

Credit: Image based on data obtained as part of the INT Photometric H-Alpha Survey of the Northern Galactic Plane, prepared by Nick Wright, University College London, on behalf of the IPHAS Collaboration.
One can only imagine what a journey along the perimeters of these spectacular regions might offer.