The real Floating Island. The Floating Island is a large piece of land held aloft by a chaos emerald. If the emerald was removed from its resting place, the island would fall. That is why Knuckles the Echidna must protect it at all times. Retrieved from "https://sonicunderground.fandom.com/wiki/Floating_Island?oldid=4022" Categories: Places Community content is available under CC-BY-SA unless otherwise noted.