I see this as the outskirts of The Pass of Aes Sidhe, from where emerged the Faeries when they came to Tir Alaind.
The Floating island (note; I hope everyone will remember that it was artist ROGER DEAN , creator of so many great album covers for YES and many others, that first painted floating islands !
Floating Palace by Dumitrescu Ioan, from CoolVibe
Fantasy Islands, Neil Richards on ArtStation at https://www.artstation.com/artwork/Lr6Rk
Githzerai floating island. The Githzerai primarily live in massive cities and citadels lifted high above the seas through powerful and ancient magical arts.
Set from around the world. Form video games and film industry.
Fantasy Island (1977)
float islands by ~DawnElaineDarkwood on deviantART