Ferropolis

Ferropolis, "the city of iron" is an open museum of huge old industrial machines in Gräfenhainichen, a city between Wittenberg and Dessau, Germany. It's an open-air museum which contains machines from the mid-twentieth century. They can measure up to 30 meters high and 120 meters long, and weigh up to 1,980 tons. Moreover, the area is used for several events such as opera performances or music festivals, including the Splash! Festival, Melt! Festival, and the "Ferropolis in Flammen" festival.