Eggman's Tower

Eggman's Tower first appear in Sonic Spinball include GG although it look like a volcano. Eggman's Tower also appear in SegaSonic the Hedgehog as the last level. It also appear inSonic Adventure and Sonic Adventure: Director's Cut as the Final Egg. Eggman's Tower also appear in the first episode of Sonic X when Sonic tries to break in. In Sonic Riders: Zero Gravity a tower called Crimson Tower it could be the same tower Eggman use.