LITHUANIA

This cover from Lithuania depicts a 0,97 Euro stamp celebrating the natural UNESCO World Heritage Site: The Curonian Spit. The Curonian Spit is a 98-kilometre long, thin, curved sand-dune spit that separates the Curonian Lagoon from the Baltic Sea coast. Its southern portion lies within Kaliningrad Oblast, Russia, and its northern within southwestern Klaipėda County, Lithuania. It is a UNESCO World Heritage Site since 2000, and it's shared by the two countries.

P. R. CHINA

TUNISIA

This cover from Tunisia depicts 2 stamps of same type issued in 2022, celebrating the Medina of Tunis. The Medina of Tunis is the medina quarter of Tunis, the capital of Tunisia. It has been a UNESCO World Heritage Site since 1979. The Medina contains some 700 monuments, including palaces, mosques, mausoleums, madrasas and fountains dating from the Almohad and the Hafsid periods.

PORTUGAL

This cover from Portugal depicts a miniature sheet issued in 1997 celebrating the Cultural Landscape of Sintra. Sintra is a town and municipality in the Greater Lisbon region of Portugal, located on the Portuguese Riviera. The municipality of Sintra has several historic palaces, castles, scenic beaches, parks and gardens. The area includes the Sintra-Cascais Nature Park through which the Sintra Mountains run. The historic center of the Vila de Sintra is famous for its 19th-century Romanticist architecture, historic estates and villas, gardens, and royal palaces and castles, which resulted in the classification of the town as a UNESCO World Heritage Site (since 1995). Sintra's landmarks include the medieval Castle of the Moors, the romanticist Pena National Palace and the Portuguese Renaissance Sintra National Palace.

ARMENIA

This cover came from Armenia and depicts one stamp (on the right) celebrating the UNESCO World Heritage Site in Egypt Memphis and its Necropolis the Pyramid Fields from Giza to Dahshur. The capital of the Old Kingdom of Egypt has some extraordinary funerary monuments, including rock tombs, ornate mastabas, temples and pyramids. In ancient times, the site was considered one of the Seven Wonders of the World and is inscribed as a UNESCO World Heritage site since 1979.

NEW ZEALAND

BRAZIL

This cover from Brazil depicts 3 stamps with endemic FLORA from the Pantanal. The Pantanal is a natural region encompassing the world's largest tropical wetland area, and the world's largest flooded grasslands. It is located mostly within the Brazilian state of Mato Grosso do Sul, but it extends into Mato Grosso and portions of Bolivia and Paraguay. It sprawls over an area estimated at between 140,000 and 195,000 square kilometres. Various subregional ecosystems exist, each with distinct hydrological, geological and ecological characteristics; up to 12 of them have been defined. Roughly 80% of the Pantanal floodplains are submerged during the rainy seasons, nurturing a biologically diverse collection of aquatic plants and helping to support a dense array of animal species. Pantanal Conservation Area was declared a UNESCO World Heritage Site in 2000.

PORTUGAL

This cover from Portugal depicts a single stamp issued in 2023 celebrating the 17th. century fortresses of the border city of Elvas, classified by UNESCO as World Heritage site for its uniqueness in the world. The site, extensively fortified from the 17th to 19th centuries, represents the largest bulwarked dry ditch system in the world. Within its walls, the town contains barracks and other militar buildings as well as churches and monasteries. While Elvas contains remains dating back to the 10th century A.D., its fortification began when Portugal regained Independence in 1640. The fortifications designed by dutch jesuits represent the best surviving example of the dutch school of fortifications anywhere

CROATIA

A nice UNESCO cover from Croatia, with a miniature sheet and a single stamp, both issued in 2019, celebrating the Plitvice Lakes National Park. Plitvice Lakes National Park is one of the oldest and largest national parks in Croatia. In 1979, Plitvice Lakes National Park was added to the UNESCO World Heritage register. The national park was founded in 1949 and is in the mountainous karst area of central Croatia, at the border to Bosnia and Herzegovina. The important north–south road that passes through the national park area connects the Croatian inland with the Adriatic coastal region.

P. R. CHINA

ALBANIA

This is my first cover from Albania, a new country in my collection.

ROMANIA

A nice cover from Romania, depicting 4 different "Tourist" stamps, including a 2,50L stamp celebrating the Danube Delta, inscribed as a UNESCO World Heritage site since 1991. The Danube Delta (Romanian: Delta Dunării) is the second largest river delta in Europe, after the Volga Delta, and is the best preserved on the continent. The greater part of the Danube Delta lies in Romania (Tulcea County), with a small part in Ukraine (Odessa Oblast). Its approximate surface area is 4,152 km2, of which 3,446 km2 is in Romania. The Danube Delta, where the Danube river enters the Black Sea, is the largest European wetland. It is home to over 300 bird and 45 freshwater fish species. Important species include sturgeons, European mink, European wildcat, Eurasian otter, and the threatened monk seal.