Krakatoa or also known as Krakatau, is a volcanic island situated in the Sunda Straits between Java and Sumatra of Indonesia. The eruption of Mount Krakatoa in 1883 had been noted as one of the most violent volcanic events ever recorded. The huge explosion blast over 4,000km all the way to Australia and India. This massive explosion cause giant tsunami and the dust from it stays in the stratosphere for several years after while killing more than 35,000 people. Mount Krakatoa is still very much an active volcano and scaling it takes precaution and would require camping a night at Rakata Island, where you can enjoy the view of Krakatoa eruption at night.