For me, maps on the internet can be an easy rabbit hole to fall into. One of my favorite artists, John Stevenson, posted a map of Thylea he did for the Player’s Guide for Odyssey of the Dragonlords (which is available for free, by the way!). A while back, he also drew a map in similar style of the mythical land of Skenara.
That latter map was featured in the occasional Atlas of Design from the North American Cartographic Information Society (NACIS). A previous edition of that atlas included a map I think is absolutely beautiful by talented Seattle local Eleanor Lutz of the surface of Mars in a medieval style. She’s also done a companion piece for Venus with a similar etymological focus on place names as her Mars map, but in a different style. I’m definitely a fan of her work.
