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Colosseum, RomeThe Roman Colosseum, like many iconic sites, has surely been photographed thousands of times. Yet in this terrific view, Heather Perry has used a long exposure time to blur the monument into an image never seen before. —Annie GriffithsPhoto Tip: Every photograph is actually a time exposure. Images may be recorded in a fraction of a second or over hours of time. Yet many people never realize that they can use time as a creative tool in photography. Remember that the shutter speed can be adjusted to do either very long or instantaneous exposures.Enjoy more photos and buy the book Simply Beautiful Photographs »

Photograph by Heather Perry, National Geographic