Colossal Cave-in Galaxy

Colossal Cave-in Galaxy is a mine world galaxy from Super Mario Galaxy 3. It has three power stars

Core Crystal Crack
In the center of the mine in a big purple crystal encasing the Power Star. You must get to the crystal and find Rock Mushrooms to break it open.

Journey to Gold Planet
You must fly from planet to planet in the galaxy and defeat each enemy on them then travel to Gold Planet. You must then fight the boss to get the key and get the Power Star.

Case of the Mini-Mine
You must locate the Mini-mine planet and travel inside it, where a maze to the Power Star awaits.

Music
thumb|300px|rightThe music is the same as the music in Spin Dig Galaxy (Super Mario Galaxy 2).