Drina basin

thumb|right|Map of the region between Bosnia, Montenegro and Serbia through which runs the Drina The Drina (, ) is a long river in the Balkans, which forms a large portion of the border between Bosnia and Herzegovina and Serbia. It is the longest tributary of the Sava River and the longest karst river in the Dinaric Alps which belongs to the Danube River drainage basin.

cave in Rogatica Municipality

river in Bosnia and Herzegovina