The longest chain of islands in the world is the Indonesian Archipelago. Stretching over 5,000 kilometers, it consists of more than 17,000 islands, including major ones like Sumatra, Java, and Borneo. The archipelago is known for its stunning biodiversity, rich cultural heritage, and significant economic resources, such as minerals and agriculture. This vast network of islands is a crucial part of Indonesia’s identity and is significant for global ecology and climate.