The trail around Puszcza Zielonka (Zielonka Forest) is up to 140 km long. Twelve charming wooden churches await the visitors in Długa Goślina, Kicin, Kiszkowo, Łagiewniki Kościelne, Raczkowo, Jabłkowo, Rejowiec, Skoki, Sławno, Uzarzewo, Węglewo and Wierzenica. The oldest of them (in Węglewo and Wierzenica) have been built in the Middle Ages; the history of the rest of them goes back to the 17th century.