Moravia occupies most of the eastern part of the Czech Republic. Moravian territory is naturally strongly determined, in fact, as the Morava river basin, with strong effect of mountains in the west (de facto main European continental divide) and partly in the east, where all the rivers rise.
Moravia occupies an exceptional position in Central Europe. All the highlands in the west and east of this part of Europe run west-east, and therefore form a kind of filter, making north-south or south north movement more difficult. Only Moravia with the depression of the westernmost Subcarpathia, 14–40 kilometers (8.7–24.9 mi) wide, between the Bohemian Massif and the Outer Western Carpathians (gripping the meridian at a constant angle of 30°), provides a comfortable connection between the Danubian and Polish regions, and this area is thus of great importance in terms of the possible migration routes of large mammals – both as regards periodically recurring seasonal migrations triggered by climatic oscillations in the prehistory, when permanent settlement started.
Moravia borders Bohemia in the west, Lower Austria in the south(west), Slovakia in the southeast, Poland very shortly in the north, and Czech Silesia in the northeast. Its natural boundary is formed by the Sudetes mountains in the north, the Carpathians in the east and the Bohemian-Moravian Highlands in the west (the border runs from Králický Sněžník in the north, over Suchý vrch, across Upper Svratka Highlands and Javořice Highlands to tripoint nearby Slavonice in the south). The Thaya river meanders along the border with Austria and the tripoint of Moravia, Austria and Slovakia is at the confluence of the Thaya and Morava rivers. The northeast border with Silesia runs partly along the Moravice, Oder and Ostravice rivers. Between 1782–1850, Moravia (also thus known as Moravia-Silesia) also included a small portion of the former province of Silesia – the Austrian Silesia (when Frederick the Great annexed most of ancient Silesia (the land of upper and middle Oder river) to Prussia, Silesia's southernmost part remained with the Habsburgs).
Today Moravia including the South Moravian Region, the Zlín Region, vast majority of the Olomouc Region, southeastern half of the Vysočina Region and parts of the Moravian-Silesian, Pardubice and South Bohemian regions.
Geologically, Moravia covers a transitive areaBohemian Massif and the Carpathians (from (north)west to southeast), and between the Danube basin and the North European Plain (from south to northeast). Its core geomorphological features are three wide valleys, namely the Dyje-Svratka Valley (Dyjsko-svratecký úval), the
Upper Morava Valley (Hornomoravský úval) and the Lower Morava Valley (Dolnomoravský úval). The first two form the westernmost part of the Subcarpathia, the last is the northernmost part of the Vienna Basin. The valleys surround the low range of Central Moravian Carpathians. The highest mountains of Moravia are situated on its northern border in Hrubý Jeseník, the highest peak is Praděd (1491 m). Second highest is the massive of Králický Sněžník (1424 m) the third are the Moravian-Silesian Beskids at the very east, with Smrk (1278 m), and then south from here Javorníky (1072). The White Carpathians along the southeastern border rise up to 970 m at
Velká Javořina. The spacious, but moderate Bohemian-Moravian Highlands on the west reach 837 m at Javořice.
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. Morava's far biggest tributaries are Thaya (Dyje) from the right (or west) and Bečva (east). Morava and Thaya meet at the southernmost and lowest (148 m) point of Moravia. Small peripheral parts of Moravia belong to the catchment area of Elbe, Váh and especially Oder (the northeast). The watershed line running along Moravia's border from west to north and east is part of the European Watershed. For centuries, there has been plans to build a waterway across Moravia to join the Danube and Oder river systems, using the natural route through the Moravian Gate.