The Mandala is one circle where do not know where you start and how you go back is a mystery since it is a circle and you don’t know where to end. So, best possible way to get into a Mandala is by destroying the Mandala.
Only while entering if you destroy the Mandala can you go back to the same point and re-enter again from that point.
Something as perfect as a Mandala cannot be solved in any other way other than this way. But the price of entering a Mandala is in its destruction and if you destroy it you really can’t built it again in the same way.