Marajó Island is the largest river island in the world, located at the mouth of the Amazon River in Brazil. It covers an area of approximately 40,000 square kilometers and is known for its unique ecosystems, including wetlands, forests, and savannas. The island is home to diverse wildlife and is an important area for biodiversity. The island's population primarily consists of caboclos, people of mixed Indigenous and European descent. Marajó Island is famous for its traditional water buffalo farming, which is a significant part of the local economy. The island also features rich cultural traditions, including music, dance, and handicrafts.