Observation deck

An observation deck, observation platform, or viewing platform is an elevated sightseeing platform usually situated upon a tall architectural structure, such as a skyscraper or observation tower.

Observation decks are sometimes enclosed from weather, and a few may include coin-operated telescopes for viewing distant features.

[citation needed] This is a timeline of the development of world's highest observation decks since the inauguration of the Washington Monument in 1885.

Approved See also List of tallest buildings and structures in the world#World's highest observation deck