Final answer:
The Patos Lagoon is found in Brazil, specifically in the city of Porto Alegre.
Step-by-step explanation:
The Patos Lagoon is located in the country of Brazil, specifically within the city of Porto Alegre. Brazil, which was once a colony of Portugal, is a large country in South America where Catholicism is the predominant religion, and Portuguese is the main language.
This multicultural nation has a rich history that includes European immigration and African slave labor, contributing to its diverse ethnic makeup. The Patos Lagoon is a significant geographical feature of this nation, located in the southern part of Brazil.