Marajó is an island located at the mouth of the Amazon River in Brazil. It is the largest river island in the world, covering approximately 40,000 square kilometers. The island is known for its rich biodiversity, featuring a variety of ecosystems, including wetlands, forests, and savannas. The population of Marajó is primarily engaged in agriculture, fishing, and cattle ranching. The island is also famous for its unique culture, which includes traditional crafts and local cuisine. The Marajoara people, known for their pottery and artistic expressions, contribute to the island's cultural heritage.