Cliff House's Giant Camera
As different advanced digital SLRs are widely used today, why not look back how the very first camera works, way back since the time of Aristotle, which is known as camera obscura. A device which project an image of the surroundings onto a surface using only existing light sources from outside like sunlight. A large-scale of camera obscura, inside where people can enjoy the view of the Pacific coast in a large parabolic disc, is located in San Francisco, listed on the National Register of Historic Places in 2001, and the last remaining structure of the world famous Playland.