The region between the Rhine and the Erft is home to about eighty wind- or watermills. Many of these mills are open to the public on certain days of the year – e.g. the Monday after Pentecost (a public holiday), the German Day of the Mill, or on the Day of Monuments in the fall. Others may be visited after previous appointment.
There is an association of supporters in the Rhine-Erft region, the "Mühlenverband Rhein-Erft-Rur e.V. It is dedicated to the preservation of these important cultural monuments, and is developing new concepts for their use and presentation.