Which UNESCO World Heritage Site is shared by Canada and the United States as a transboundary peace park?

Waterton-Glacier International Peace Park is the UNESCO World Heritage Site shared by Canada and the United States as a transboundary peace park.

The park links Waterton Lakes National Park in Alberta with Glacier National Park in Montana. UNESCO inscribed the combined property in 1995 because of its distinctive mountain scenery, ecological importance, and international cooperation. The area includes sharp peaks, glacial landforms, lakes, prairie transitions, and diverse wildlife habitats.

The two national parks were joined as an International Peace Park in 1932. The designation symbolized friendship and cooperation across the border, making the area an early and famous example of protected landscapes managed with an international outlook. The Waterton-Glacier complex also lies within the larger Crown of the Continent ecosystem.

It is easy to confuse this property with the Kluane-Wrangell–St. Elias–Glacier Bay–Tatshenshini-Alsek World Heritage Site, another Canada–United States transboundary property. That site is farther northwest and covers a much larger Alaskan, Yukon, and British Columbian wilderness.