The ancient city of Koblenz is at a geographic nexus known as the Deutsches Eck (German Corner) in the heart of the Mittelrhein region. Rivers and mountains converge here: the Mosel flows into the Rhine on one side; the Lahn flows in on the other a few miles south; and three mountain ridges intersect.
Founded by the Romans in AD 9, the city was first called Castrum ad Confluentes (Fort at the Confluence). It became a powerful center in the Middle Ages, when it controlled trade on both the Rhine and the Mosel. Air raids during World War II destroyed 85% of the city, but extensive restoration has done much to re-create its former atmosphere. As the host of Germany's Federal Horticultural Show in 2011, the city saw widespread urban development, including the new Seilbahn that transports visitors across the river and up to the Ehrenbreitstein fortress.