Pupu Springs is located near Nelson, South Island, New Zealand. Starting from Nelson, you can take a tour of Tasman National Park. This spring is said to be the largest freshwater spring in South Island, New Zealand. A freshwater river emerges from the ground, with more than 17,000 cubic meters of water per second. It is really amazing that it can emerge, and the water is extremely clear, with green in the blue, and various other colors in the green.