Park · MT, US
Waterton-Glacier International Peace Park
At a total of 4,606 km2 (1,138,167 acres), the parks share the distinction of being the world’s first International Peace Park (1932), two UNESCO Biosphere Reserves, and a single UNESCO World Heritage Site.
| Type | Park |
| State / Province | MT |
| Country | United States |
| Certified | 2017 |
| Coordinates | 48.7194, -113.8345 |
| Source | https://darksky.org/places/waterton-glacier-international-peace-park-dark-sky-park/ |