I wonder if Termina's an alternate reality, or just on the other side of the planet? I'll answer that myself, actually: it must be alternate, because Link split the Triforce by going there; yet Oracles Link took part of the Triforce with him to Holodrum, Labrynna and Subrosia. This also means that Subrosia is not an alternate world, simply under Holodrum
If the Dark world is a separate reality (to which Ganon was sent), does that mean that there is one Ganon between several alternate Hyrules? Is the Twilight realm an alternate Dark World?
An entire post stating the obvious - that was easy
Link never split the Triforce!
I reckon ther's three worlds: Light, Dark and Twilight