The Old Oak Tree The large old English oak tree on the Müllenberg has been considered a natural monument since 1940. Many years ago this oak tree was analysed and is estimated to be 330 years old. The special oak - pedunculate oak (Quercus robur, The old oak on the top of the "Müllenberg"), shows a very strong branch formation at a trunk height of 3.5 m.
The Heimbach reservoir offers a perfect combination of nature experience and relaxation - with hiking trails, pedal boat and canoe tours as well as a detour to the impressive art nouveau power station in Heimbach.