Lake Pukaki is a large glacial lake located in the South Island of New Zealand. It is known for its striking turquoise blue color, which is caused by fine glacial silt suspended in the water. The lake is approximately 21 kilometers long and is situated at the foot of the Southern Alps, providing stunning views of the surrounding mountains. The lake is a popular destination for outdoor activities such as fishing, boating, and photography. It also serves as a key water source for the Waitaki hydroelectric scheme. Visitors often enjoy the scenic drive along the lake, which offers breathtaking vistas of the landscape.