Kawah Ijen, East Java

Have you ever seen the blue flame? If you haven’t – and you are the adventurous kind of couple, Kawah Ijen might be the best choice for you. The electric-blue flame is the natural phenomenon that occurs every day, at night or a few moments before dawn. To reach this place, a two-hour hike is required, followed by a 45-minute hike down to the bank of the crater. But after all that walking and hiking, it will all be worth it.