If you want some real magic, visit this Austrian lake that is a lake only half a year. Yes, you read that right. This place turns into an underwater park during the summer and that is because the lake is only 1-2 meters deep during the winter and looks more like a pond, but during the summer months, higher temperatures melt the snow from the Hochschwab mountains and fill the basin of the land up to 12 meters. The lake got the name ‘Green Lake’ (Gruner See in German) because of its emerald-green water which is actually a reflection of the forests that surround the lake, together with the mountains. Because of its features, Green lake offered a number of really great activities such as swimming and scuba-diving which was the biggest attraction knowing what an oasis you can find underwater, but unfortunately, that was recently prohibited due to the fears of pollution. Besides that, there are many paths and bridges where visitors can walk or go for a bike ride and discover every inch of this gorgeous lake. Just 25 kilometers away from the lake is located the green heart of Austria, Bruck an der Mur.