Aoraki Mackenzie International Dark Sky Reserve

The Aoraki Mackenzie International Dark Sky Reserve is an area of 4367 km2 that was designated as an International Dark Sky Reserve by the International Dark-Sky Association in June 2012. The reserve is located in the Mackenzie District in the South Island of New Zealand. At the time of the designation in 2012, the reserve was the largest in the world, and the only reserve of its type in the Southern Hemisphere.

The area covered by the reserve includes the Aoraki / Mount Cook National Park and the Mackenzie Basin, Lake Pukaki and Lake Tekapo. The main settlements within the reserve are Mount Cook Village, Twizel, and Lake Tekapo (town).

The night sky brightness in the reserve ranks at a level 2 on the nine-level Bortle Dark-Sky Scale, representing a truly dark site with high astronomical observability of celestial objects. The low level of light pollution in the area of the reserve has been supported by a lighting by-law that was included in the Mackenzie District Plan in 1981.

The Mount John University Observatory is located in the reserve, and is the main astronomical research observatory in New Zealand. There is also a star-gazing tourism venture, Dark Sky Project, operating in the Lake Tekapo township.