The Euromast Rotterdam is the highlight of the city.
One can enjoy from the ‘ship’s mast’ the view of the city in the open air.
Built in just 23 days on the occasion of the Floriade Horticultural Expo of 1960.
The height is 330 feet and with a rotating gondola one it is raised another 275 meters.
On the west side the seaports and the North Sea are visible and in a northerly direction you can see Amsterdam, The Hague and Utrecht.
At the top of the viewing platform are two hotel suites, if you want to have the Euromast to yourself.
https://www.holland.com/global/tourism/destinations/rotterdam/the-euromast.htm