Stadler Berg Observation tower, Wooden observation tower in Stadel bei Niederglatt, Switzerland.

The Stadler Berg observation tower is a 25-metre wooden tower on the Stadlerberg in the municipality of Stadel bei Niederglatt, canton of Zurich. It was inaugurated on 24 June 2023 and replaced a wooden tower built in 1964. More than 138 wooden steps lead to the viewing platform at a height of 25 metres. It was designed by Graf Biscioni Architekten of Winterthur and is called the Lilienturm after an emblem on Stadel's municipal coat of arms.

A first 25-metre wooden tower was built in 1964; because of its proximity to Kloten airport, a beacon was mounted on its viewing platform. In 2019 the Stadel municipal council decided to demolish the 55-year-old structure, and it was closed from late August 2022 and torn down on 20 October 2022. The replacement, designed by Graf Biscioni Architekten of Winterthur, was inaugurated on 24 June 2023.

The name Lilienturm comes from the lily emblem on Stadel's municipal coat of arms. The tower was inaugurated on 24 June 2023, replacing the 1964 wooden tower that stood on the same hill above the village.

Access is provided via marked paths leading from Stadel bei Niederglatt to the tower, with a straightforward climb manageable for most visitors. Coming in clear weather provides the best views from the platform.

The tower is named Lilienturm after the lily emblem on Stadel's municipal coat of arms. Its south-facing panorama panel identifies Alpine peaks from the Schäfler to the Breithorn. The 2023 replacement was designed by Graf Biscioni Architekten of Winterthur.