The Weser ferry 'Petra Solara' is the only solar ferry in NRW and connects the two Weser villages Hävern and Windheim.
Thus, it has an important function as the Stork-Route, the Culture-Route, the LandArt-Route as well as a relief road of the Weser bicycle path run near the villages Hävern and Windheim via the Weser ferry.