In some years, this river may flow entirely into a namesake sinkhole in the White Jurassic limestone formation.
In some years, this river may flow entirely into a namesake sinkhole in the White Jurassic limestone formation. This river forms the western border of the historical territory of Dobruja, where many ethnic Turks fled to after the flooding of this river's island of Ada Kaleh. The confluence of this river with the Drava is preserved by a nature park where tourists can ride a bike trail called the (*) Pannonian Peace Route. Two large hydroelectric dams were built in the late twentieth century within this river's Iron Gates. Until they were united, this river divided the neighboring cities of Buda and Pest. For 10 points, name this second-longest European river that passes through Bratislava, Belgrade, and Vienna on its way to the Black Sea.
In some years, this river may flow entirely into a namesake sinkhole in the White Jurassic limestone formation.
Danube