Dettifoss is a waterfall on the river Yekulsau-au-Fedlum in Northeast Iceland, and it is the most powerful waterfall in Europe. It is located in the most famous national park of Vatnajökull.
It is strange to hear this combination of words. However, it is a fact. In the Australian Talbot Bay are several unusual waterfalls that appear only at high tide, which makes the definition of waterfall controversial.