In Purmerend there are roughly 33,000 trees, of which only 30 are included in the monumental tree trail. These trees have been carefully chosen and what they have in common is their age, as each and every one of them is ancient. The route takes you past part of the historical remains of the city walls that surrounded the city, the Nieuwegracht. The walking trail runs through the historical section of Purmerend past a number of common and less common trees. About thirty of them have a name plate.