Rabbit's Wormhole is a special time wormhole or dimension for General Rabbit. He often uses it to pass the time and uses it to try to find Mr. Pink in the past and conquer the Land of Time. Inside also lays a special stage where he performs his magic tricks, it is here where he is fought.
Its a long road made of playing cards in a dimension outside of time itself. In the center, the sands of time, much like an hour glass fills the world.