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Brazil
The coordinates 23 degrees south and 46 degrees west correspond to the city of Campo Grande in Brazil. It is the capital of the Mato Grosso do Sul state and is known for its cultural heritage and outdoor activities.
That's in the water near Rio de Janeiro.
Paraguay is located at 23 degrees south latitude and 58 degrees west longitude.
There isn't one, unless it's Atlantis. 23S 82W is in the Pacific Ocean. Havana, Cuba, however is at 23 North, 82 West.
23 S 44 W is in the South Atlantic Ocean, off the coast of Brazil, near the city of Rio de Janeiro.
Peru
The coordinates 23 degrees south and 45 degrees west of Russia would place you in the southern Atlantic Ocean, relatively close to Brazil.
Rio De Janerio
No city. That's in the middle of the desert in Mauritania.
The city that is approximately located at 23 degrees north latitude and 83 degrees west longitude is Miami, Florida, USA.