Top photos from 26 spots for Observation Deck
56th floor of Tour Montparnasse (indoors 1 floor below), Paris
Vancouver Lookout
View from Triangle Tower in Cologne
56th floor of Tour Montparnasse (indoors 1 floor below), Paris
Southern view from John Hancock Center, Chicago
Panoramic terrace of Tour Montparnasse, Paris
56th floor of Tour Montparnasse (indoors 1 floor below), Paris
Panoramic terrace of Tour Montparnasse, Paris
View from Triangle Tower in Cologne
Maintower visitor platform, Frankfurt am Main
56th floor of Tour Montparnasse (indoors 1 floor below), Paris
Northern view from John Hancock Center, Chicago
