Never forget where you took a picture. This digital SLR attachment identifies latitude, longitude and elevation along with the exact time of any photo that you take. As long as you have a compataible Nikon digital SLR or Fujifilm Pro camera, the location information is attached to every individual photo file. Never again will you forget where or when you snapped a particular picture.
A little pricey, but available for just under $300 here.