Grugaturm, Observation tower in Rüttenscheid district, Essen, Germany.

The Grugaturm is a 29-metre steel-framework tower in Grugapark, designed in 1928 by architect Paul Portten in the Bauhaus manner and completed in 1929 in 19 days of construction. Its side and rear walls were filled with Heraklith lightweight panels, and a slightly cantilevered viewing platform of 30 square metres sits at the top, reached by a stair of about 100 steps. A stylised tulip, the park's logo, crowns the structure.

The tower was built in 1929 for the Great Ruhr Garden Exhibition and remarkably completed in just 19 days. It was later expanded with an oval platform during the 1938 Reich Garden Show.

The tower once broadcast music and news programs when radio receivers were uncommon in homes, serving as a symbol of modern communication in its era. People gathered to experience these transmissions as a shared public event.

The tower has been closed to the public since 1987 because of the poor condition of its steel structure, and renovation begun in 2000 is still unfinished. Visitors can only view it from outside in Grugapark; the roughly 100 steps to the platform and the lift added in 1938 are not in use.

A stylized tulip design created by artist Jo Pieper was installed at the tower's peak in 1952 for the Second Gruga Exhibition. This artistic detail remains visible today and adds an unexpected creative touch to the structure.