The Green Lake is a breathtaking natural phenomenon in Austria that fascinates every visitor. This beautiful lake is located in the Styrian region of Tragöß in the Hochschwab area, about an hour's drive northwest of Graz. What makes the Grüner See so unique is its extraordinary play of colours. In spring, when the snow in the surrounding mountains melts, the lake fills with crystal-clear meltwater. The name "Green Lake" comes from the emerald green hue the water takes on. The green color comes from the sunlight falling and reflecting on the limestone-covered underwater landscape.