Rhine
The Rhine begins its journey in the Swiss canton of Graubünden, where two distinct streams merge to form the river's true identity. The Anterior Rhine springs from Lai da Tuma near the Oberalp Pass, while the Posterior Rhine rises from the Paradies Glacier below the Rheinwaldhorn. These waters travel through deep valleys separated by gorges like Roflaschlucht and Viamala before meeting at Reichenau in Tamins. This confluence creates the Alpine Rhine, which then flows northward through a wide glacial valley known as the Rhine Valley. The river descends 203 meters over nearly 86 kilometers, passing towns like Chur and Sargans along the way. At Sargans, a natural dam only a few meters high prevents the water from flowing into Lake Walen or Lake Zurich. Instead, it empties into Lake Constance on Austrian territory, creating an inland delta that includes the towns of Gaißau, Höchst, and Fußach. Human engineering has since diverted the flow into modern canals to counteract constant flooding and sedimentation issues.
Millions of years ago, tectonic plates shifted to create the Upper Rhine Graben, a massive rift system stretching between southwest Germany and eastern France. During the Miocene period, a primitive river system developed within this graben, though it did not yet carry water from the Alps. Stream capture events gradually extended the watershed southward, eventually incorporating streams down to the Vosges Mountains and the Moselle River. By the early Pleistocene, the Rhine had captured most of its current Alpine watershed from the Rhône, including the Aare. Around 450,000 years ago during the Anglian glaciation, ice blocked the northern part of the present North Sea, forcing the river to divert through what is now the English Channel. This diversion caused rivers like the Thames and Seine to become tributaries to the Rhine. The last glacial maximum occurred roughly 22,000 to 14,000 years before present, when sea levels dropped approximately 120 meters below today's level. Meltwater from thawing glaciers added volume to the river, which flowed west through the Netherlands and extended into the Atlantic Ocean via the dry land that once connected Europe to Britain.
In the first century BC, the Rhine formed the boundary between Gaul and Germania, marking the edge of the civilized world for Roman geographers. Augustus ordered his stepson Drusus to establish fifty military camps along the river in 12 BC, initiating the Germanic Wars. The plain of the Lower Rhine was home to the Ubii tribe, who founded Oppidum Ubiorum on the grounds of modern Cologne in 38 BC. By AD 50, this settlement became Colonia Claudia Ara Agrippinensium, officially recognized as a city by Rome. Between AD 14 and 180, eight legions were stationed at five bases along the river, including Vetera at Xanten and Argentoratum at Strasbourg. These forces maintained control over the frontier until the empire fell. Beyond these rivers, Rome held only the fertile plain of Frankfurt opposite Moguntiacum (Mainz) and scattered bridgeheads. The southern part of the frontier differed significantly from the north, where the river remained deep and broad enough to serve as an impenetrable barrier. Germanic tribes eventually crossed the river during the Migration period, establishing kingdoms like Francia on the Lower Rhine and Burgundy on the Upper Rhine by the fifth century.
The Middle Rhine flows through a narrow valley known as the Rhine Gorge between Bingen am Rhein and Bonn, creating one of Europe's most scenic landscapes. This stretch features more than forty castles and fortresses from the Middle Ages lining the steep slopes above the water. In 2002, UNESCO designated the Rhine Gorge between Rüdesheim am Rhein and Koblenz as a World Heritage Site under the name
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Common questions
Where does the Rhine river begin its journey?
The Rhine begins its journey in the Swiss canton of Graubünden where two distinct streams merge to form the river's true identity. The Anterior Rhine springs from Lai da Tuma near the Oberalp Pass while the Posterior Rhine rises from the Paradies Glacier below the Rheinwaldhorn.
When did tectonic plates shift to create the Upper Rhine Graben?
Tectonic plates shifted millions of years ago to create the Upper Rhine Graben a massive rift system stretching between southwest Germany and eastern France. During the Miocene period a primitive river system developed within this graben though it did not yet carry water from the Alps.
Who ordered military camps along the Rhine in 12 BC?
Augustus ordered his stepson Drusus to establish fifty military camps along the river in 12 BC initiating the Germanic Wars. Between AD 14 and 180 eight legions were stationed at five bases along the river including Vetera at Xanten and Argentoratum at Strasbourg.
What is the length of the Alpine Rhine section before Lake Constance?
The river descends 203 meters over nearly 86 kilometers passing towns like Chur and Sargans along the way. At Sargans a natural dam only a few meters high prevents the water from flowing into Lake Walen or Lake Zurich instead it empties into Lake Constance on Austrian territory.
Which part of the Rhine was designated as a World Heritage Site in 2002?
UNESCO designated the Rhine Gorge between Rüdesheim am Rhein and Koblenz as a World Heritage Site under the name Rhine Gorge in 2002. This stretch features more than forty castles and fortresses from the Middle Ages lining the steep slopes above the water.