50 Fun Facts About Danube River

The Danube is Europe's second-longest river after which?

It runs about 2,850 km from the Black Forest to the Black Sea.

Into which sea does the Danube empty?

It arrives via a delta shared by Romania and Ukraine.

The Danube passes through or borders how many countries?

Its drainage basin extends into nine more, or ten if Kosovo is counted.

Which four national capitals stand on the Danube?

No other river in the world flows through as many capitals.

The Danube takes its name at the meeting of the Brigach and Breg in which German town?

The confluence lies in the town's palace park; the Breg itself rises at Furtwangen and is the longest headstream.

The Danube rises in which German mountain range?

The Rhine also begins nearby, and the two rivers compete for southern Germany's water.

The ancient Greeks knew the Danube by which name?

The Latin forms were Danubius, Danuvius, Ister or Hister; the Thraco-Phrygian name Matoas meant 'the bringer of luck'.

Which is the most populous city on the Danube?

Its agglomeration holds about 3.3 million people; the Hungarian capital's Danube banks are a UNESCO World Heritage Site.

Which Romanian city is the largest port on the Danube?

Brăila marks the upper limit of the maritime sector reachable by ocean ships.

How many countries does the Danube's drainage basin extend into beyond the ten it touches?

They range from Bosnia and Herzegovina at 4.6% of the basin down to slivers of Italy, Poland, North Macedonia and Albania.

The highest point in the Danube's drainage basin is which Alpine summit?

It stands 4,049 m on the Italy-Switzerland border; the basin as a whole is home to 83 million people.

The Danube's middle section, downstream of the Devín Gate near Bratislava, crosses which lowland?

Also known as the Carpathian Basin, it takes in the Hungarian plains of Kisalföld and Alföld.

The Iron Gate I dam recorded a record peak discharge on 13 April 2006 of roughly how much?

The gorge holds two hydroelectric stations, and downstream of the second the river runs free for more than 860 km to the sea.

The oldest planned settlement in Europe, Lepenski Vir, sits on the Danube in which gorge?

Archaeologists named a whole Mesolithic culture, dated 13,000 to 5,000 years ago, after the gorge.

The Danube Delta, the largest river delta in the European Union, lies mostly in which country?

Its northern part is in Ukraine's Odesa Oblast; it has been a UNESCO World Heritage Site since 1991.

The Danube Delta's wetlands host migratory birds of more than how many species?

They include the endangered pygmy cormorant, and the marshes support 45 freshwater fish species.

The Danube splits into how many main distributaries in its delta?

The delta stretches from Pătlăgeanca to Sulina, where the river meets the Black Sea.

The 1992 canal joining the Danube to the North Sea does so via which German river?

The Rhine-Main-Danube Canal created a 3,500 km waterway from Rotterdam to Sulina and joins the Danube at Kelheim.

The Danube-Black Sea Canal, finished in 1984, shortens the trip to the sea by roughly how far?

It runs 64 km between Cernavodă and Constanța in Romania.

Ocean-going ships can sail up the Danube as far as which Romanian city?

River ships continue to Kelheim in Bavaria and small craft to Ulm.

What happens to the upper Danube at the Donauversickerung on many summer days?

The water flows through porous limestone and resurfaces 12 km south at the Aachtopf spring, feeding the Rhine instead.

Geologists predict the Danube's upper course will one day be lost entirely to which river?

The process is called stream capture; before the last ice age the Alpine waters that now feed the Rhine ran east down the Urdonau.

The Danube's Aachtopf spring holds what German record?

It pours out an average of 8,500 litres per second north of Lake Constance.

Which Persian king crossed the Danube in the late 6th century BCE to attack the Scythians?

Alexander the Great later reached the river from Macedonia in 336 BCE.

Roman forces crossed the Danube into Dacia after building a bridge in 101 CE near which garrison town?

The victory over Decebalus created the province of Dacia, which Aurelian abandoned in 271.

For centuries the Danube marked the northern border of which power?

Ottoman-Hungarian and Ottoman-Habsburg wars were fought along it from 1366 to 1791.

Which 1526 clash on the Danube was among the most important Ottoman victories along the river?

The Ottomans besieged Vienna three years later, in 1529.

Which animal was hunted to extinction along the Bavarian Danube in the 19th century?

The Beluga sturgeon population collapsed in the same era after 2,400 years of exploitation for meat and caviar.

How many species of sturgeon are native to the Danube basin?

All are threatened, and the European sea sturgeon has vanished from the river entirely; the Iron Gates dams built in 1974 and 1984 had no fish passes.

Which large salmon species is endemic to the Danube basin?

It has since been introduced to other rivers by humans.

International free navigation on the Danube dates to a conference in which year?

The Paris Conferences of 1856 and 1921 set up the first international regime for the river.

Danube shipping was disrupted in 1999 when NATO bombed three bridges in which country?

The debris was cleared by 2002 and a temporary pontoon bridge removed in 2005.

How many major dams stand on the Danube?

They include Melk and Freudenau in Vienna; downstream of the Iron Gate the river runs free for more than 860 km.

The Danube supplies drinking water to roughly how many people?

In parts of Baden-Württemberg almost 30% of the water comes from the purified river.

What is a Zille?

The craft developed in the Austrian and German stretches and are still used for fishing and ferrying.

Which English king was jailed in Dürnstein Castle above the Danube?

The Route of Emperors and Kings from Regensburg to Budapest takes its name partly from him and Frederick Barbarossa.

Which Austrian composer wrote The Blue Danube waltz?

It premiered in February 1867 for a Vienna men's choir and was only a mild success until Strauss reworked it for orchestra.

The Romanian waltz 'Waves of the Danube' by Iosif Ivanovici became famous in English under what title?

Al Jolson, Rosemary Clooney, Vera Lynn and Tom Jones have all recorded it.

Which author wrote the 1908 novel The Danube Pilot about fisherman Serge Ladko?

Algernon Blackwood's eerie short story 'The Willows' is also set on the river.

Claudio Magris's celebrated 1986 book Danube is what kind of work?

He follows the river from source to delta, tracing Europe's ethnic, literary and ideological history.

The Danube features prominently in which country's national anthem?

In Lithuanian folk songs the Danube turns up more often than Lithuania's own longest river, the Neman.

Hungary's first permanent Danube crossing (1849), linking Buda and Pest, is commonly called what?

Designed by William Tierney Clark and built by Adam Clark, it is officially the Széchenyi Chain Bridge.

The 2026 drought exposed 20-plus German ships scuttled in 1944 near which Serbian town?

The same drought revealed mammoth bones in Bulgaria and the foundations of Constantine's Roman bridge.

Which Hungarian nuclear plant had to cut output when low Danube levels reduced its cooling water in 2026?

It normally supplies nearly half of Hungary's electricity; a rock sill was planned to raise the river by up to a metre.

The Danube Bike Trail runs from the river's source to its mouth; which section is by far the longest?

That final leg is 1,670 km, more than the other three sections combined.

Which jazz musician wrote the symphony Stories of the Danube, first performed in Linz in 1993?

The Weather Report co-founder was himself Austrian-born.

Which author's eerie short story 'The Willows' is set mostly on the Danube?

Jules Verne's The Danube Pilot and Claudio Magris's essay Danube are the river's other literary landmarks.

The 16th-century painters known as the Danube school worked in which countries' tradition?

They developed a landscape style in the Danube valley, working largely independently of one another.

The Sultans Trail follows the Danube from Vienna to which Serbian town before heading for Istanbul?

The Vienna-Budapest stretch is 323 km and Budapest-Smederevo another 595 km.

The 450-km Donausteig hiking trail, opened in 2010, runs from Passau to which Austrian town?

Its 23 stages pass through five Bavarian and 40 Austrian communities.