The technical term would be the "antipode".
For Pensacola Florida, this is a spot in the Indian ocean about 2000 miles west of Perth, Australia. The nearest dry land is probably the Kerguelen Islands, and even those are well over a thousand miles away.
The farthest point north on the Earth is the North Pole. The farthest point south on the Earth is the South Pole.
That would place you in the area of Wets Plains, Missouri - according to Google Earth.
The halfway point between Charlotte and Pensacola is Newman, GA.
The South Pole is the farthest point south.
The South Pole is the farthest point from the North Pole.
Chimborazo in Ecuador is the farthest point from the center of the earth
north pole and south pole are the farthest points on earth
The Earth's center core
Apogee
aposelenium
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Pensacola, FL