Indonesia.

Bromo Volcano is a striking peak of the Tengger Caldera within the Bromo-Tenger-Semeru National Park. Located in the eastern part of the island of Java, Indonesia. The height of the volcano reaches 2392 meters, and the diameter of the crater is 600 meters.

To reach the top of Bromo you need to climb a high staircase of 250 steps. The crater itself is an unfenced pit with steam escaping.