In Essen Grugapark you can find a very unusual building of Austrian architect Hundertwasser. The building is called House of Ronald McDonald and was opened in 2005. For some reason we decided that it was just McDonald's and went there to have a meal in an unusual building. But on site we found out that it was a rehabilitation center for seriously ill children. Ronald McDonald Foundation built more than 250 family centers around the world.
The park is a botanical garden, so there will be something to see in addition to the Hundertwasser House. Plan of the park in PDF can be viewed here, the Hundertwasser House has the number 11 on the scheme.
Getting there: The park is open daily from 9 am to sunset, entry price is 4 euros. Plan of the entrances to the park can be found here. Beware, there is no entrance near the house and "Ausgang Virchowstrasse" is only exit. From the railway station in Essen the place can be reached by U-Bahn #U11 to the Messe Ost/Gruga or Messe West/Süd/Gruga stops as well as by U-Bahn #U17 to the Margarethenhöhe/Endstation station.