The 70th floor had been open as an observation deck from 1933 to 1986.
We went outside on the observation deck, and everyone took a second to look around.
About 200 people were reported on the 86th-floor observation deck at the time.
I was going to go to the observation deck, instead.
An observation deck near the top is open to the public.
An observation deck is a place up high where people can see things.
City Hall has an observation deck, free to the public.
There is an observation deck on the third floor of the building.
Even so, he expected to reach the observation deck within minutes.
From here he couldn't tell if any people were on the observation decks.
