Elizenturm Tower dominates the city's botanical gardens. It was built in 1838. Textile magnate Engelbert Eller was the initiator of its construction. He had land property with a villa and green-house in what was then the town of Elberfeld (which became a part of Wuppertal in 1929). He built a tower there on the foundations of an old mill in order to use it as an observatory. The tower height is 21 meters. It was named in honor of the wife of the King of Prussia - Elisabeth of Bavaria.
Subsequently, the farm belonging to the family Eller, was donated to the city. In 1910 the farm’s land plot became part of the botanical garden. After 1945 the tower was again used as an observatory for some time. After extensive renovation in the 60s of the XX century, Elizenturm became a viewing platform and space for exhibitions. The tower’s observation deck offers a beautiful view of the garden and the city. It is also pleasant to take a walk in the garden among flowers, a fountain, lawns and benches. Entrance to the zoo is free.