From the south-west side a large park Tiergarten adjoins to the castle, where you can find deer. The park was founded in the 17th century and is one of the oldest zoos of the Renaissance epoch. Admission is free, find here opening times.
At the moment the castle houses a restaurant and a hotel (booking.com). Access to the territory is free, visit to the museum if only by appointment.
Getting there: by bus to the stop Schloss, Raesfeld. Find schedule on
http://bahn.de.