Super Mario World/Special
If you found the secret exit in Star World 5, you can access the secret world Special. Be careful though, the levels in Special are far from easy.
Once Special is completed, the colors of the world map, as well as some enemies, will be different. The upper Star Road will lead you back to Yoshi's House.
Note: When completed, this page will contain info on the creatures in and the difficuty of the world.