Colosseum, Rome

Photograph by Heather Perry, National Geographic

The 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 Griffiths

Photo 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 »