Where is the largest national park in the European Union, and one of the largest national parks in the world?

Question

Where the Brazilian state of Paraná borders Argentina, the area includes what National Park, a UNESCO World Heritage Site since 1986?

Answer 1

French Guiana
Guiana Amazonian Park covers about 33,900 sq km (13,090 sq mi) of rain forest. In 20,300 sq km (7,840 sq mi) full protection is enforced and a further 13,600 sq km (5,250 sq mi) is under secondary protection.