The old city of Dubrovnik | Croatia

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Dubrovnik is a Croatian city situated on the coast of the Adriatic Sea. The old city, once known as the ‘Pearl of the Adriatic’ is a UNESCO World Heritage site.

City of Zadar | Croatia

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Zadar is the oldest continuously-inhabited Croatian city. It is situated on the Adriatic Sea. Zadar was once the largest city-fortress in the Republic of Venice and its City Walls were an important part of an elaborate defence system.

It was included in UNESCO's World Heritage Site list as part of "Venetian Works of Defence between 15th and 17th centuries: Stato da Terra – western Stato da mar" in 2017. This property consists of 6 components of defence works in Italy, Croatia and Montenegro.

Fortified city of Bergamo (Italy)
Fortified city of Peschiera del Garda (Italy)
City Fortress of Palmanova (Italy)
Defensive System of Zadar (Croatia)
Fort of St. Nikola, Šibenik (Croatia)
Fortified city of Kotor (Montenegro)

Flags of the World | Croatia

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The current flag of Croatia was officially adopted on 21 December 1990, about ten months before the proclamation of independence from Yugoslavia.

Fortified city of Kotor | Montenegro

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The fortifications of Kotor are an integrated historical fortification system that protected the medieval town of Kotor containing ramparts, towers, citadels, gates, bastions, forts, cisterns, a castle, and ancillary buildings and structures.

It was included in UNESCO's World Heritage Site list as part of "Venetian Works of Defence between 15th and 17th centuries: Stato da Terra – western Stato da mar" in 2017. This property consists of 6 components of defence works in Italy, Croatia and Montenegro.
Fortified city of Bergamo (Italy)
Fortified city of Peschiera del Garda (Italy)
City Fortress of Palmanova (Italy)
Defensive System of Zadar (Croatia)
Fort of St. Nikola, Šibenik (Croatia)
Fortified city of Kotor (Montenegro)

St. Nicholas' Fortress | Croatia

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St. Nicholas is a fortress located in the town of Šibenik, one of the oldest native Croatian towns on the eastern shores of the Adriatic, in central Dalmatia, Croatia.

It was included in UNESCO's World Heritage Site list as part of "Venetian Works of Defence between 15th and 17th centuries: Stato da Terra – western Stato da mar" in 2017. This property consists of 6 components of defence works in Italy, Croatia and Montenegro.
Fortified city of Bergamo (Italy)
Fortified city of Peschiera del Garda (Italy)
City Fortress of Palmanova (Italy)
Defensive System of Zadar (Croatia)
Fort of St. Nikola, Šibenik (Croatia)
Fortified city of Kotor (Montenegro)

Plitvice Lakes National Park | Croatia

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Plitvice Lakes National Park is famous for its beautiful cascaded lakes, caves and waterfalls. The forests in the park are home to bears, wolves and many rare bird species.

Plitvice Lakes National Park is a UNESCO World Heritage site.

Primosten Island | Croatia

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Primosten is a small town located between Sibenik and Split in Croatia. The old town is situated on a small island which is connected with the mainland.

In the past it was an island protected by stone walls and towers and in the 16th century a movable bridge was built that connected this village with the mainland. Later the bridge was replaced by an embankment and Primosten thus becomes a peninsula.

The Euphrasian Basilica in Poreč | Croatia

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The Euphrasian Basilica or the Cathedral Basilica of the Assumption of Mary is a basilica in Poreč, Croatia. The most striking feature of the basilica are its mosaics, dating from the 6th century.

The Basilica is part of UNESCO World Heritage site Episcopal Complex of the Euphrasian Basilica in the Historic Centre of Poreč.

Historic City of Trogir | Croatia

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Trogir is a town on the central Adriatic coast of Croatia. Its preserved old town, known for its mix of Renaissance, baroque and Romanesque buildings, lies on a small island connected to the mainland and the island of Čiovo by bridges.

Historic City of Trogir is a UNESCO World Heritage site.

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The stamp on the right shows Mulo lighthouse island.

Cathedral of St James | Croatia

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Šibenik is a historic city in Croatia, located in central Dalmatia region. The Cathedral of St James in Šibenik, built between 1431 and 1535, is a UNESCO World Heritage site.

Plitvice Lakes National Park | Croatia

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Plitvice Lakes National Park is famous for its beautiful cascaded lakes, caves and waterfalls. The forests in the park are home to bears, wolves and many rare bird species. This National Park was added to the UNESCO World Heritage list in 1979.

Murter Island | Croatia

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Murter is an island in the Croatian part of the Adriatic Sea. The island is only 6 meters away from land and is connected to the mainland by a mobile bascule-bridge. 

Most of the island is covered with age - old olive trees and fig-trees, which are the main traditional crops grown by the natives. The island is surrounded on most parts by the Kornati islands.

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Lighthouse Grebeni stands on a rugged rock populated only by yellow-legged gulls. The island is located a four-kilometre boat ride from Dubrovnik's Old Harbour. The stamp is part of a set of four stamps about Croatian lighthouses (2015).

Hvar Island | Croatia

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Hvar is a Croatian island located off the Dalmatian coast. The island is the 4th most populated of the Croatian islands, with a population of about 11,000. 

Parts of the harbor of Hvar and surrounding areas are part of Defensive System of City of Hvar. That is part of Unesco World Heritage site inscribed under the name "Venetian Works of Defence between 16th and 17th centuries".

In the end it didnt make it to the list of world heritage sites.
https://whc.unesco.org/en/decisions/6893

The World Heritage Committee,

1. Having examined Documents WHC/17/41.COM/8B and WHC/17/41.COM/INF.8B1,
2. Inscribes the Venetian Works of Defence between 15th and 17th centuries: Stato da Terra– western Stato da Mar, Croatia, Italy, Montenegro, namely six of the fifteen nominated serial components: the Fortified City of Bergamo, the Fortified City of Peschiera del Garda and the City Fortress of Palmanova (Italy), the Defensive System of Zadar and the Fort of St Nikola at Šibenik-Knin County (Croatia), and the City of Kotor (Montenegro), on the World Heritage List on the basis of criteria (iii) and (iv);

Tkon village, Pašman island | Croatia

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Tkon is a typical fishing village and port, located on the island of Pašman, off the coast of the Adriatic Sea in Croatia.  Pašman is surrounded by the islands Ugljan, Iž, Dugi otok and Kornati. It is the 12th island in Croatian archipelago by land area.

The uninhabited islets surrounding Pašman island are frequented by bottlenose dolphins.

Ugljan Island | Croatia

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Kukljica is a picturesque tourist and fishing village, located on the southeast of the Croatian island of Ugljan. The island is also called the green island because it is covered by dense bush, pine trees, olive trees, fig trees, vineyards and other Mediterranean plants. 

The old city of Dubrovnik | Croatia

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Dubrovnik is a Croatian city situated on the coast of the Adriatic Sea. The old city, once known as the ‘Pearl of the Adriatic’ is a UNESCO World Heritage site. 

The Kornati Islands | Croatia

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The Kornati islands are an archipelago of the Croatian coast, comprising over 100 islands. The largest island is Kornati.

The archipelago is a national park since 1980. Once covered with forests but today the islands have a desert-like appearance. Due to burning  down the foliage to make pasture for sheep.

  

Mulo Lighthouse Island | Croatia

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Built in 1873, Mulo is one of the oldest Croatian lighthouses. It consists of an octagonal stone tower, attached to a 2-story stone keeper's house. The lighthouse is located in the Adriatic Sea on a tiny island.

 

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(right) Palagruža is a small, remote Croatian archipelago in the middle of the Adriatic Sea.

Saint Mary's Monastery, Croatia

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Saint Mary's is a 12th century Benedictine Monastery located on an isolated little island in Mljet National Park in Croatia. Actually it is an island in a lake on another island.

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Part of a set of 4 self-adhesive stamps (for international use) about Croatian undersea world (issued 2014). This stamp depicts Yellow-tube sponge.  

Diocletian's Palace, Split | Croatia

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The ruins of Diocletian's Palace, built between the late 3rd and the early 4th centuries AD, can be found throughout the Croatian city of Split.

This palace is today the heart of the inner-city where all the most important historical buildings can be found. There are many attractions within the palace, but the most viewed is the Saint Duje Cathedral (Saint Dujam).  Thx Mirna!