WBelene Island or Persin Island is the biggest island in Bulgarian waters. The island is formed by the Danube River splitting into two branches passing north and south of it. The international frontier between Bulgaria and Romania follows the north branch of the river and therefore Belene Island is part of the Bulgarian territory. The island is 14.5 kilometres (9.0 mi) long and reaching 6 km (3.7 mi) in width; it is located in the Danube, north of the town of Belene. Belene Island is the fourth biggest Danube island: during an average tide it is 41.078 square kilometres (15.860 sq mi) in area. During a high tide, parts of the island are submerged. The island is connected to the town of Belene with a pontoon bridge.
WThe Danubian Plain constitutes the northern part of Bulgaria, situated north of the Balkan Mountains and south of the Danube. Its western border is the Timok River and to the east it borders the Black Sea. The plain has an area of 31,523 square kilometres (12,171 sq mi). It is about 500 kilometres (310 mi) long and 20 to 120 kilometres wide.
WThe Iskar is a right tributary of the Danube. With a length of 368 km it is the longest river that runs entirely within Bulgaria. Originating as three forks in Balkan's highest mountain range Rila, it flows in northern direction until its confluence with the Danube River. As it flows northwards it fuels the largest artificial lake in the country, the Iskar Reservoir, forms the divide between the Vitosha and Plana Mountains in the west and the Sredna Gora mountain range in the east before entering the Sofia Valley, which contains the nation's capital Sofia. From there the Iskar runs through the Balkan Mountains forming the spectacular 84 km long Iskar Gorge and as it crosses the mountains its water course turns in north-eastern direction at Lakatnik. North of the Balkan Mountains the river crosses the Danubian Plain and finally flows into the Danube between the villages of Baykal and Gigen. Geologically, Iskar is the oldest river in the Balkan Peninsula.
WThe Osam is a river in northern Bulgaria. Its drainage basin is in between that of the river Vit to the west and the Yantra system to the east. The river has two main tributaries in its upper course: the Black Osam takes its source from the foot of Levski Peak in the Balkan Mountains, at an altitude of 1,821 m (5,974 ft), while the White Osam has its source on the northern slopes of the Kozya Stena peak. In Troyan, the black and white Osam join. It runs north towards Lovech, then north-east until Letnitsa and Levski, where it turns north-west until it flows into the river Danube 5 km west of the town of Nikopol. The ancient name of the river was Assamus.
WThe Vit also Vid is a river in central northern Bulgaria with a length of 188 km. It is a tributary of Danube. The source of the Vit is in Stara Planina, below Vezhen Peak at an altitude of 2,030 m, and it empties into the Danube close to Somovit. The river has a watershed area of 3,228 km², its main tributaries being Kamenska reka, Kalnik and Tuchenitsa.
WThe Wine Museum is a museum of wine and viticulture located in Pleven, a city in north central Bulgaria. Opened on 17 September 2008, the museum occupies a natural cave in Pleven's Kaylaka park, about 5 kilometres (3.1 mi) from the city centre.
WZlatna Panega is a river in central northern Bulgaria, originating from a karst source at the village of Zlatna Panega, Yablanitsa municipality, Lovech Province. During the Ottoman rule in Bulgaria it was known as "Altǎn Paneg". Zlatna Panega's source is the largest Karst source in Bulgaria and the water temperature is relatively constant throughout the year. Although the Zlatna Panega is only several dozen kilometres in length, it runs through the villages of Zlatna Panega, Rumyantsevo, Petrevene and the town of Lukovit before emptying into Iskar River. It is also very popular among Bulgaria's fishing community, as it is a great place to fish brown trout, rainbow trout, chub, mountain barbel and even ide and perch.