From Sonic Retro
Levitated Ruin is the fourth zone of Sonic and the Secret Rings. Sonic has to jump on giant flying animals traversing the ruins in the sky.
The ground, under the clouds, makes it look like the flying fortress and Sonic are above a very large, Arabian jungle or forest.
Sonic and Shahra find Sinbad locked in the pirates' cage. Instead of telling them how to defeat Ifrit right away, he asked if they could release him from the cage. Once freed, Sinbad says they should use the water blue World Ring to cool the Ifrit for battle.