Bell Rock Lighthouse celebrates 200 years shining
1 February 2011 Last updated at 13:28 GMT
It is 200 years to the day since Robert Stevenson's Bell Rock lighthouse first illuminated the North Sea, 11 miles from the Scottish coast.
The granite tower has saved countless ships from peril and still remains an essential life-saving aid to navigation despite advances in radio and satellite technology.
Scotland correspondent Glenn Campbell visited the Bell Rock to find out why it is so important.