Geologically, Moravia covers a transitive area between the Bohemian Massif and the Carpathians (from (north)west to southeast), and between the Danube basin and the North European Plain (from south to northeast).
The fluvial system of Moravia is very cohesive, as the region border is similar to the watershed of the Morava river, and thus almost the entire area is drained exclusively by a single stream.