- Posadas is the capital city of the Misiones province in Argentina. It is located in the northeastern part of the country, near the border with Paraguay. The city is situated along the Paraná River and has a population of approximately 370,000 people. Posadas is known for its natural beauty, with nearby national parks and rivers offering opportunities for outdoor activities such as trekking, boating, and fishing. The city has a humid subtropical climate with hot summers and mild winters. Posadas is also a regional commercial and cultural center, with a university, museums, theaters, and a variety of shops and restaurants.