ALBANIA

UN VIENNA

This cover from United Nations (Vienna Office) depicts 4 stamps of the same type, celebrating the World Heritage Site Olympic National Park, USA. This National Park is located in the State of Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west-side temperate rainforest, and the forests of the drier east side. In 1976, Olympic National Park was designated by UNESCO as an International Biosphere Reserve, and in 1981 as a World Heritage Site.

SULTANATE of OMAN

BRAZIL

PHILIPPINES

KUWAIT

UN VIENNA

This cover from United Nations (Vienna Office) depicts 4 stamps of the same type, celebrating the Yellowstone National Park, an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in the world. The park is known for its wildlife and its many geothermal features, especially the Old Faithful geyser, one of its most popular. While it represents many types of biomes, the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion. Yellowstone National Park is inscribed as a World Heritage Site by UNESCO since 1978.

PORTUGAL

This cover from Portugal depicts a miniature sheet celebrating the "Prehistoric Rock Art Sites in the Coa Valley", an open-air Paleolithic archaeological site located in northeastern Portugal, near the border with Spain. In the early 1990s rock engravings were discovered in Vila Nova de Foz Côa during the construction of a dam in the Côa River valley. They include thousands of engraved rock drawings of horses, bovines and other animals, human and abstract figures, dated from 22,000 to 10,000 years B.C. The Prehistoric Rock-Art Sites in the Côa Valley were designated a World Heritage Site by UNESCO in 1998. The archaelogical site of Siega Verde, province of Salamca, Spain, was also added to the Côa Valley Paleolithic Art site in the World Heritage List in 2010.

SRI LANKA

POLAND

SPAIN

This beautiful cover from Spain depicts a miniature sheet issued in 2023 with a picture of the Serra de Tramuntana, in Mallorca Island. he Serra de Tramuntana is a mountain range running southwest–northeast which forms the northern backbone of the Spanish island of Mallorca. It is also the name given to the comarca of the same area. On 27 June 2011, the Tramuntana Range was awarded World Heritage Status by UNESCO as an area of great physical and cultural significance.

UN VIENNA

This cover from UN Vienna depicts 4 stamps of the same type, celebrating the Great Smoky Mountains National Park, an American national park in the southeastern United States, with parts in North Carolina and Tennessee. The park straddles the ridgeline of the Great Smoky Mountains, part of the Blue Ridge Mountains, which are a division of the larger Appalachian Mountain chain. The park contains some of the highest mountains in eastern North America, including Clingmans Dome, Mount Guyot, and Mount Le Conte. The border between the two states runs northeast to southwest through the center of the park. The Appalachian Trail passes through the center of the park on its route from Georgia to Maine. Te park was designated as a UNESCO World Heritage Site in 1983, and an International Biosphere Reserve in 1988.

BELARUS

P. R. CHINA

CROATIA

CZECH REPUBLIC

This cover came from Czech Republic features 4 stamps of the same type (issued in 2023), celebrating the sp town of Frantiskovy Lázne. The Town of Frantiskovy Lázne in Karlovy Varí region is one of the Spa Towns in Europe, listed as a World Heritage Site since 2021. The Great Spa Towns of Europe is a transnational World Heritage Site consisting of a selection of 11 spa towns across seven European countries. They were developed around natural mineral water springs. From the early 18th century to the 1930s, Western Europe experienced an increase in spa and bathing culture, leading to the construction of elaborate bath houses. These would often include gardens, casinos, theatres, and villas surrounding the springs and the bath house. The city of Bath was originally inscribed on UNESCO's World Heritage List in 1987. The efforts to get the Great Spas of Europe onto the World Heritage List began in 2012, and the nomination was submitted in 2019. On 24 July 2021, the Great Spas of Europe were officially inscribed on the World Heritage List.

UN VIENNA

This amazing cover from UN Vienna depcits a miniature sheet issued in 2023 with pictures of eminet fishes from the Great Barrier Reef. The Great Barrier Reef is the world's largest coral reef. It is near the coast of Queensland, Australia. It is made up of nearly 2900 coral reefs and over 600 islands. It is 327,800 km2 big and 2600 km long. It has been listed an important World Heritage Site by UNESCO in 1981. The Great Barrier Reef is the largest structure made by living things. It can be seen from outer space. The Reefs are threatened. The biggest threat to the Great Barrier Reef today is coral bleaching caused by high sea water temperatures as a result of global warming.

HONDURAS

This cover from Honduras depicts several stamps and 2 miniature sheets on both sides of the envelope. On the front side a mnisheet of 1,50 lempiras celebrates de World Heritage Site Maya Site of Copan. The Maya Site of Copan is one of the most spectacular archaeological sites of the ancient Maya civilization and was declared UNESCO World Heritage in 1980. Located in a majestic landscape in western Honduras, the city saw Maya sculpture reach its highest artistic expression.

HONDURAS

SRI LANKA

UN VIENNA

This cover from UNO Vienna depicts 4 stamps of the same type, celebrating the Selimiye Mosque and its Social Complex, in Turkey. The Selimiye Mosque is an Ottoman imperial mosque, which is located in the city of Edirne (formerly Adrianople), Turkey. The mosque was commissioned by Sultan Selim II, and was built by the imperial architect Mimar Sinan between 1568 and 1575. It was considered by Sinan to be his masterpiece and is one of the highest achievements of Islamic architecture as a whole and Ottoman architecture in particular. The mosque, together with its külliye, was included on UNESCO's World Heritage List in 2011.

P. R. CHINA