An antipode is anything that is diametrically opposite; the exact opposite. The plural, antipodes, refers to any two places directly opposite each other on the earth. You'll sometimes see a reference to the Antipodes. This is a chiefly British usage, referring to Australia and New Zealand.
Where are the Antipodes (from Much Ado about Nothing)?
At the end of Act II, Scene 1 of Shakespeare's Much Ado about Nothing, Benedick is at his most exasperated with Beatrice's insults. When he hears her approaching, he asks Don Pedro to send him on any errand — even to the other side of the world-just to get him away from Beatrice:
Will your Grace command me any service to the world's end? I will go
on the slightest errand now to the Antipodes that you can devise to
send me on . . .