Lake Taupo lies in the centre of the North Island of New Zealand. Famed for its trout fishing and boating, the lake merely fills the caldera of one of the largest super-volcanoes in the world in a still active geological region.
About 26,000 years ago, Lake Taupo was a volcano that erupted in an enormous explosion that ejected about 800 cubic kilometres of material and spread it over the central north island, forming the volcanic plateau. This is believed to be the second largest volcanic eruption to have ever occurred on earth. The resulting hole in the ground became Lake Taupo after it filled with water draining off the surrounding hills.
Today, Lake Taupo feeds the Waikato river with enough water to run 8 hydroelectric power stations.