A black Saturn wouldn't do it justice. Saturn doesn't bend space as extremely as a block hole does, and it's that extreme bending of space that's the hard part to visualise about a black hole. It's trivial to imagine a black ball with a ring around it, but it's the bending of space and the subsequent bending of light that's the hard part.
Yep bending of light and warping is hard to visualize.
Thankfully we can play with our own black hole at home.
I took my crystal ball cut some cardboard into a ring.
If you look, you can see both side of the ring behind the black hole :
