Aussichtsturm Dietzenbach, Observation tower in Dietzenbach, Germany.

Aussichtsturm Dietzenbach is a 33-metre steel-tube tower on the Wingertsberg (198 m), designed by architect Wolfgang Rang under the name "Ballett der Bewegung" and built in 2001. A left-turning spiral staircase with 119 steps leads to a round platform 8.5 metres across, mounted eccentrically at 21 metres. Above it sit two horizontal metal spoked wheels; the upper one, fitted with blades, turns in the wind and gave the tower its nickname Helikopterturm. Eight steel cables stabilise the structure.

The structure was built in 2001 during the Hessentag festival and has since marked a location on Wingertsberg hill. Its creation coincided with a time when the Rhein-Main region was reshaping its public spaces and setting new landmarks in the landscape.

Architect Wolfgang Rang named his 2001 design "Ballett der Bewegung" (Ballet of Movement). The nickname Helikopterturm comes from the two horizontal spoked wheels above the platform: the upper one, fitted with blades, turns in the wind. From the platform, Frankfurt am Main is visible about 12 kilometres away, with the Taunus behind it on clear days.

Steps lead to the observation platform, which offers open views in clear weather but closes during rain, storms, or icy conditions. It is wise to wait for good weather and wear sturdy shoes, since conditions at this exposed height can be changeable.

The tower's nickname, Helikopterturm, comes from the upper spoked wheel: it is fitted with blades and turns in the wind. Eight thick steel cables stabilize the structure, four of them passing through the platform floor. On clear days Frankfurt am Main, about 12 kilometers away, and the Taunus behind it are visible.