Krakatoa

The Krakatoa is a natural wonder.

Description
Krakatoa is a volcanic island situated in the Sunda Strait between the islands of Java and Sumatra in Indonesia. The name is also used for the surrounding island group and the volcanoes as a whole.

The Krakatoa volcanoes erupted and exploded in 1883, causing massive tsunamis and killing at least 36,417 people, while simultaneously destroying over two-thirds of Krakatoa island. The explosion is considered to be the loudest sound ever heard in modern history, with reports of it being heard up to 4,800 km from its point of origin. The shock waves from the explosion were recorded on barographs around the globe.