This cache is part of a series of four caches which have been placed near the northernmost, easternmost, southernmost and westernmost points of Graz. All caches can be found independently of each other.
According to the map the northernmost point of Graz is at N47°08.077 E015°23.861 where the road takes a sharper bend. Along the road you will see some bordermarkers. To find the cache (0,5l translucent plastic box with a blue lid) enter the little path behind the transformer. Turn right at the house and continue for about 30m. Then look for tree standing on a rock. Once you have identified the right tree the hiding place should be obvious.
You could park at N47°07.935 E15°23.858 leaving you a 300m walk.