Do you know where you would be if you tried to dig a hole all the way to the other side of the world?
I found the following website, with an interactive mae
I’d come out smack dab in the middle of the Indian ocean, as would many people in the central US. If, however, one lived on the big island of Hawaii you’d come out in northern Botswana.
The major islands of Hawaii, the North Slope of Alaska, and a small area at the northern border of Montana are the only parts of the USA with antipodes on dry land.
The maps at: Antipodes - Wikipedia make it easier to see where antipodes are. 
Botswana.
In the water, about 50 miles southwest of Australia.
On the border between the Indian and Southern oceans, about 600 km WNW of Port Jeanne d’Arc.
I’ve actually been at two pairs of exact antipodes. Places where roads I’ve traveled were matched exactly at an geometrically determinable point. One pair is Pekanbaru, Sumatra, Indonesia, and Quito Ecuador. The other is at Taipei, Taiwan, and the road into Paraguay’s Chaco near Asuncion.
My present antipodes are in the middle of Brazil, south of Manaus, where I have also been, but a few hundred miles apart. Closest matches in that area would be Zamboanga, Philippines and Mauaus, or Brunei and a spot between Manaus and Leticia, Colombia, where I’ve also been. I’ve been to Guam, which would be just offshore near Salvador, Brazil.
Ive also been to the Zambia-Botswana border, but that misses Hawaii’s big island by about 100 miles. Ive never been to Hawaii.
Swimming near the Antipodes islands, because I’m in England, and we got to write the maps round there.
I’ve been to the nearest point on New Zealand’s mainland to the spot, but not to the Antipodes Islands themselves.
Several hundred miles to the southeast of Madagascar, in the Indian Ocean.
I had hoped I’d come up in the Seychelles. I always wanted to visit there.
It’s a peculiar happenstance that almost every spot on dry land has ocean as its antipodean point.
Yep, I noticed that, but it’s still fun to play around. If you are in Madric, Spain, the antipodes is somewhere on the north island of New Zealand.
As far as I know, I’ve only ever been to two places that have antipodes on land: Beijing (Argentina) and Peru (Cambodia and Vietnam, depending on exactly where I was).
Indian ocean west of Australia
Hey, me too! Right now, though, if I dug straight through the Earth I’d come out hundreds of miles south/south east of Madagascar. So I’d drown pretty quickly.
Right in the middle of the North Atlantic. Drowning.
Currently living in Bellevue, WA, which puts me in the Indian Ocean southeast of South Africa. Which is neat in a way, because I grew up there.
I feel a bit like this guy: “You can’t get any further away, before you start coming back” 
Happiness
About 3° S and 11° W of the SW corner of Australia, out in the Indian Ocean somewhere. (Or maybe the Southern Ocean. Not sure where one fades into the other.)
Indian Ocean, several hundred miles due west of the southern part of Western Australia.
Glub.
Bad news: Indian Ocean
Good news: Only a 2,000 km swim to Port-aux-Francais!