Mahameru volcano.
Indonesia's seismic and volcanic activity is among the highest in the world.

Indonesia is a nation of 17,508 islands in the South East Asian Archipelago, making it the world's largest archipelagic state. With a population of over 200 million, it is the world's fourth most populous country and the most populous Muslim-majority nation. Its capital is Jakarta and it shares land borders with Papua New Guinea, East Timor, and Malaysia.

The Indonesian Archipelago, home of the Spice Islands, has been an important trade destination since Chinese sailors first profited from the spice trade in ancient times. Indonesia's history has been influenced by foreign powers drawn to the archipelago by its wealth of natural resources; Indian-influenced Hindu and Buddhist kingdoms flourished.