Siemens Wind Turbine (
http://skyscraperpage.com/cities/?buildingID=7619 ) carried in a height of 80 metres an observation deck.
Its use was also "observation" !
Additional information to be added
* Wind turbine with observation deck
* Height of observation deck: 80 metres
* type: Enron 1.5s
* nacelle height: 85 metres
* rotor diametre: 70 metres
* power: 1500 kW
* The turbine was dismantled in 2014 after it reached the end of its life span. It parts were recycled so they could be used in new wind turbines.
Source:
https://www.emporis.com/buildings/12...er-netherlands