"Admiral Byrd once said “that enchanted continent in the sky, land of everlasting mystery!”"
https://stephwynne.medium.com/is-there-land-beyond-the-south-and-north-poles-not-on-our-maps-the-man-who-knew-too-much-2781a6b0af5b
"Hyperborea is not an island, but a skyland."
"Hyperborea was a floating island in the North Pole sky. A suspended continent with thousands of people in several cities among forests, orchards, fields, mountains and rivers."
https://eden-saga.com/en/hyperborea-in-the-sky-over-northpole.html