Essen's transformation from coal-and-steel powerhouse to cultural city is most visible at Zollverein, the UNESCO-listed former coal mine that has become the Ruhr's most striking attraction. Beyond Zollverein, the Museum Folkwang has one of Germany's best collections of nineteenth and twentieth-century European art, and Villa Hügel — the palatial former home of the Krupp dynasty — offers an unsettling window into German industrial history. The Grugapark provides green relief in a dense urban landscape.