Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet ...

The lake is known as Rotomairewhenua, or Blue Lake, and it sits inside Nelson Lakes National Park in New Zealand’s South Island. According to reports by CNN, Nelson Tasman and other scientific ...

Starting from the country’s main gateways, such as Auckland and Christchurch, these road trips offer the best chance to ...

Blue Lake, New Zealand Located in the Nelson Lakes National Park, Blue Lake holds the title of the clearest freshwater lake in the world. Its water visibility reaches up to 80 metres, making it a ...

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. (CNN/Janet Newel) ...