I mean, I do have detailed ideas of how some locations look - in Between Earth and Pyrroth, the Temple of Rhyvven looks a lot like that first castle image, except built into a mountain with about 1/3 of it underground.
The palace of the Eternal Emperor of D'Gar has shorter towers, and one side is pressed against a stone cliff, but otherwise it looks a lot like the last image there.
If the characters ever travel to the Throne City of Sadrahanal, though... then I'll have to describe things in detail. The city was originally three towns, located at different sections on a delta. The first king of the region combined two of the towns into one via massive bridges. The guy who deposed him managed to combine all three before he was assassinated. The region progressed without a real ruler for almost two decades, during which the bridges were built up more, and people began constructing houses alongside the bridges. Some were floating structures, others anchored.
When a new ruler arrived, he built a palace (much like the second image in the first post) in the center of it all, one of the greatest engineering feats of his age.
Then some local merchants built houses that were taller than the castle... After the king beheaded the first two, and tore down their homes, he realized this tactic was only a short term one, and had the bridges built up again. Using them as a foundation, he built a larger palace that towered over everything, and which would require either magic or importing a lot of materials from distant lands to even come close to eclipsing.
Then the so-called Assassin King took over, and the Treaty States were formed, leading (after five generations) to the "modern" political set-up (which gets complicated)... But the city itself is an engineering wonder, and the castle even moreso, even two hundred or so years after its construction...