The water tower of the former Oberlahnstein freight station is located at Braubacherstrasse 9a. The tower was built in 1899 and is largely preserved in its original condition. The water tank on the tower supplied the steam locomotives with water until the 1960s. The locomotives were usually equipped with a coal car including a water tank. The water tower belongs to the "Intze" type. In this model, the iron boiler rests on a narrower tower. It was connected with a pipe to the taps on the tracks. With the help of taps, the water from the tower was let into the tanks of the locomotives. The tower tank was filled with water from the Rhine.