If you like live theater performances, book yourself some seats for a show at Philharmonie Essen. Look online for scheduling details.
It won't take you too long to discover why this arts and culture attraction is a hit with travelers to Stadtkern. Pay the entry fee and then take your time exploring. If you're in the mood for more fun sightseeing adventures, Sea Life Oberhausen, Alpincenter Bottrop and Zollverein Coal Mine World Heritage Site are easy to reach from Philharmonie Essen.