Transboundary protected areas

old forest in Poland and Belarus

transnational UNESCO world heritage site

international park

protected areas of Côte d'Ivoire

international park in the United States of America and Canada

national park of Poland

national park in Slovakia

transnational protected area in Belgium and the Netherlands

protected area

glacial fjord or sea inlet that forms part of the border between Northern Ireland and the Republic of Ireland

thumb|Sea lavender blossoms in August–September

transfrontier park in Namibia and South Africa

protected area in Portugal

Wadden Sea national parks of the North Sea

protected area that spans boundaries of more than one country or sub-national entity, where the political border sections that are enclosed within its area are abolished

UNESCO World Heritage Site in Spain and France

island in Washington County, Maine, United States

Morokulien (), also known as Fredsriket ("The Republic of Peace"), is a symbolic area on the Norway–Sweden border. A peace monument was erected there in 1914 to mark a century of peace between the two countries, and in 1959 the site became the ceremonial microstate of Morokulien during a joint Swedish–Norwegian radio broadcast. The site is widely regarded as the world's first transboundary peace park. In 2025, Morokulien became home to the world's first bi-national police station, jointly staffed by Norwegian and Swedish officers. The area functions as a cross-border tourist destination and cu

Transboundary Biosphere reserve in Albania and North Macedonia | designated in 2014

United States National Historical Park, in Skagway, Alaska with a unit in Seattle, Washington

international park between Canada and the United States

park on the Canada-United States border

conservation agreement initiated by the World Wide Fund for Nature to protect a 2.2×10⁵ km² forested region on Borneo island

pair of National Forests in the United States

protected area in Portugal

transboundary Biosphere reserve in Belarus, Poland and Ukraine

Cartierheide is a natural landscape area in the south of the Netherlands in province North Brabant located close to the Belgian border in the natural region called The Campine (local name in Dutch: De Kempen). On the other side of the border is Belgium's first national park, Hoge Kempen.