Regensburg, Germany – Danube River Cruise: See our Regensburg Photos HERE RIVER CRUISE GUIDE Bank (Danube) Right KM 2379 Altitude 336m/1,102ft Population 150,000   Regensburg is also called Ratisbon, and is situated at the confluence of the river Regen into the Danube. The present-day old city was a Celtic settlement (Radasbona), which later became the […]