The Joachim Ringelnatz Museum is located at Südersteinstraße 44 in Cuxhaven. The opening times are: Tue to Sun from 10am to 1pm and from 2pm to 5pm. Guided tours can be booked by appointment. Further information on current events can be found at: ringelnatzstiftung.de
For Ringelnatz enthusiasts, of course, a primary source, but also the obvious Lokal Ringelnatz is interesting. You can browse through a variety of drinks or pears, beans and bacon for the "Buchthaie" in one of the many Ringelnatz readings.