[citation needed] In 1951, National Theater (Manhattan) rooftop theatre re-opened as a cinema.
Guerrilla outdoor cinemas are very basic, often needing to be completely set up and dismantled in a single night.
[4] The world's oldest outdoor cinema, still in operation, is Sun Picture Gardens in Broome, Western Australia.
Unusual locations to show a movie outdoors include of skyscraper rooftops, screens floating on a lake with spectators sitting on boats, screenings where guests watch a movie in hot tubs or drive-in cinemas on the top floor of a parking garage.
In cold-weather climates, public film screenings have been projected onto surfaces of snow, in such countries as Finland and Canada.