I visited this WHS in May 2013. The area includes 6 shafts, the coking plant and what has now been converted to the Ruhr Museum. There are 2 ways to explore this site: using the media guide and going around alone, together with a guide (only way to enter the coking plant). In the afternoon, the only tour in English is at 3pm and is 2 hours long. The Ruhr Museum is inside one of the shafts and offers an opportunity to see the old rusty machinery up close. The museum is huge and there are permanent exhibitions, temporary exhibitions, a 360 degree panoramic film, an observation deck to take in the breath of the whole Ruhr area and the Zollverein. If you visit this WHS on a rainy day you won't be disappointed!