From smoking volcano craters and thick rainforests to towering waterfalls, Indonesia has some of the most varied hiking experiences on the planet. With over 400 volcanoes, plenty of jungle treks, and even rare wildlife such as orangutans and Komodo dragons, it provides great treks for any level of fitness. This guide gives information about 30 of the best hikes through Java, Bali, Flores, Sumatra, Maluku, and beyond—everything from short, easy scenic walks to challenging summit climbs.