The nature reserve "Cisy nad Liswartą” (The Yew trees on the Listwarna River) is a forest and flora reserve. The protected area of the reserve is almost 24 hectares, and it is located in the commune of Herby, near the hamlet of Łęg. The Reserve was established in 1957. Apart from the yew trees, there are several communities of the protected plants, here. Currently, this area is part of the Nature Park "Forests on the Upper Liswarta". One can learn more about the reserve thanks to the educational trail.