The best building is like the best writing - the rule 'write what you know' becomes 'build what you know'. That of course doesn't mean that people have to go to Jupiter before they can write a sci fi novel or make a Jovian EEP. 'Knowing' can be a flexible factor. Some people do lots of research, some look within themselves to find that magical harmony of design. Look at the builds on Outworldz, like Virunga, and their Alexandria build, blogged about here. Or how about Tosha Tyran's Taj Mahal or Angkor Wat, or Dalaran, by Wendie Blackthorn over on Kinky Haven - thoroughly researched and thought through. The same goes for Nyx Breen and his Jazzland builds. Another great example is Star Ravenhurst's Land of Xzar - based on her own novel. You can think of a dozen more, no doubt. Add them in the comments section, if you'd like.
This is Serenity Manor on Serenity Grid, by Erwan Elan. If the grid name is familiar you may remember it from a post about a year ago about the Monet House. This region doesn't have the same aim at realistic precision as Monet's place, with its phenomenal attention to factual detail, but it is a masterclass in authenticity of genre, instinctively right in tone and proportions.