observation deck

: an act or instance of observing a custom, rule, or law

: observance

: an act of recognizing and noting a fact or occurrence often involving measurement with instruments

: designed for use in viewing something (such as scenery) or in making observations

: a platform in a ship serving usually as a structural element and forming the floor for its compartments

: something resembling the deck of a ship: such as

: a story or tier of a building (such as a sports stadium)

: cover

: to clothe in a striking or elegant manner : array

: decorate