jena is partly in the middle hall valley between from mixed woodlands covered shelly limestone and sandstone slopes (geological phenomena are among other things the devil holes and the student chute). on them, numerous partially rare orchideenarten occurs. from north to south jena is wide, and from east to west . the following larger cities are close to jena: gera, approx. east, erfurt, approx. west, weimar, approx. west, naumburg (saale), approx. northeast, is (saale), to approx. northeast, leipzig, approx. northeast and chemnitz, approx. east, rudolstadt, approx. south.