This may well be the best explanation of particle colliders, like the Large Hadron Collider, I’ve seen in a long time.
Click through for full sized version, and for the Feynman diagram in the red button caption.
Of course, none of it might be fundamental. It might be structure, patterns, mathematics, whatever, all the way down. Even when we can’t go down any further, there will always be doubt that maybe, perhaps, there is something more fundamental farther down than we can observe.