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.

List of public observation decks

List of highest observation decks by type

Timeline of world's highest observation decks

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

Under construction

** Approved ** See also List of tallest buildings and structures in the world

Observation deck gallery