The Au - the 'Green Jewel' of the city of Mürzzuschlag - is under landscape protection and features a fitness mile, running trails, and an adventure path: Join 'Waldemar Wurzel' from the Mürzer Oberland in search of the Green Jewel. Nature is made excitingly tangible with the latest in nature education. Experience nature just five minutes from the city center of Mürzzuschlag!