GeoOracle #124: Danube
15 October 2026 · Region · Difficulty 2 of 5
How it opened
I've carried empires on my waters and now connect a continent.
The five clues
- 01Once I marked where Rome's power ended, now I'm a thread stitching ten nations together.
- 02I flow southeast from a dark forest in the southwest, eventually meeting a sea of black.
- 03Four European capitals rise along my banks: one in Austria, one in Slovakia, one in Hungary, one in Serbia.
- 04At 2,850 kilometers, I'm the second-longest river on this continent, and my delta sprawls across Romania before my waters turn saline.
- 05I originate in Germany's Black Forest region and pass through or border Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine.
The answer
Danube
About this place
For millennia, this mighty river has been Europe's lifeblood and boundary—once marking the edge of Roman dominion, now a peaceful connector of nations. Its waters carry history through Central and Southeastern Europe, flowing past four national capitals and countless historic cities. As the continent's second-longest river, it remains one of the most strategically and culturally significant waterways in the world.
Fact sheet
- Country
- Germany
- Continent
- Europe
- Coordinates
- 48.095, 8.155
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