Rialto Towers observation deck (Melbourne) is now closed to the public. Superfluous with nearby Eureka Tower.
It is cool to see how many of these I have actually visited.
Vancouver's is missing (Harbour centre) from the list. As are the two observation towers on the Canadian side of Niagara Falls.
There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know. -Donald Rumsfeld
Didn't you notice on the plane when you started talking, eventually I started reading the vomit bag?