Perhaps it doesn't go anywhere. It just returns back to empty space. In a vortex you have both spin and compression or rotation and gravity. Planets and stars are the results of twisted electromagnetic fields forming vortex fields. Galaxies too are immense vortex fields in space.
Black holes are vortex drains returning matter back to empty space.
You cannot have a vortex without a drain. There is nothing new about this concept. It is as old as the ancient ruins in Mexico. I want to bring your attention to a picture of an ancient symbol that can be found in Mexico on various artifacts and tablets. You may also recognize this as a symbol used by the Native American Mound Builders.