The historical swathe of land Walachia, also called Tara Romaneasca („Romanian country“), covers the southern part of present day Romania with an expanse of about 78 000 square miles. Limited by the southern Carpathians in the north, Walachia stretches 200 kilometres into the south with a hilly landscape, which descends gradually. There it meets the river Danube and forms the border to Bulgaria. From west to east it has got a length of approximately 430 kilometres and ends with a flat plain where the Romanian capital Bucharest is situated. Geographically Walachia is divided by the river Olt into a region called “small Walachia” to the west and one called “big Walachia” to the east.