In New Zealand’s Nelson Lakes National Park, about 1,200 meters (4,000 feet) above sea level and a two-day hike from nearest civilization, lies Rotomairewhenua, or Blue Lake.

Lake Rotorua, which sits at the heart of a dormant volcano and is the setting for one of New Zealand's most famous Māori love stories, has been mapped in detail for the 1st time.

New Zealand scientists on Tuesday increased the alert level for the volcano below the country's biggest lake, which caused the largest eruption on earth in the past 5,000 years when it last ...