The Gualeguaychú River is located in northeastern Argentina, flowing through the province of Entre Ríos. It stretches approximately 200 kilometers and is known for its scenic beauty and rich biodiversity. The river is a popular destination for recreational activities such as fishing, kayaking, and swimming. The river eventually merges with the Uruguay River, contributing to the region's water system. The surrounding area is characterized by lush vegetation and wildlife, making it an important ecological zone. The city of Gualeguaychú, situated along the river, is famous for its annual carnival celebrations, attracting many visitors each year.