Yeah, from how I understand it, the kingdom Noctis and friends come from is based off our modern real world but the other kingdoms are fantasy based.

Accordo looks pretty fantastical.



Also there have been little overworld snippits that have more fantasy-esque things in them.



According to Tabata and Co. what we're seeing is all from only a portion of a tenth of the world map, so that's something to keep in mind.