This is called the Tropical Zone or the Tropics, because it is between the tropic of Capricorn, and the tropic of cancer.
The tropics
There can be no such body of water, because no place on Earth can have a latitude coordinate greater than 90 degrees. The north pole is at 90 degrees north latitude, and the south pole is at 90 degrees south latitude. Those points are the farthest north and south you can go, respectively.
That's in the water south of Anchorage.
The waterway located at 50 degrees North and 3 degrees South is off the coast off Start Bay in Devon.
The north pole is over water and the south pole is over land.
Panama .
COOK STRAIT
Water. LOTS and LOTS of water. These coordinates are in the South Atlantic, about halfway between Africa and South America. The nearest point of land is St. Helena Island, the place where the deposed emperor Napoleon Bonaparte was exiled and imprisoned after his defeat at the battle of Waterloo. St. Helena is about 700 miles north of these coordinates.
It is in-between the continents of north America and south America however I would say that it is in the north Americana continent.
No single point on Earth has both a north and a south latitude. The Atlantic andPacific Oceans are both big enough to include points at both of those latitudes.
Gulf of Mexico!
44 N 100 W is south Dakota and a point west of the Missouri River