The country with the most active volcanoes in the world is Indonesia. It is located on the Pacific Ring of Fire, where tectonic plate movement leads to significant volcanic activity. Indonesia has more than 130 active volcanoes, including notable ones like Mount Merapi and Mount Sinabung. This volcanic landscape is not only geologically fascinating but also contributes to the country's fertility and cultural beliefs surrounding volcanoes. The challenges posed by volcanic eruptions highlight the importance of monitoring and disaster preparedness in the region.