* Italian Roberto Giudici captured images while sailing off Greek island
* Taken in 1999 but have only been unveiled after appearing on NASA website
*Seeing one waterspout is considered to be once-in-a-lifetime event
Seeing just one waterspout is thought by many to be a once-in-a-lifetime event, but one lucky boat passenger managed to capture four in these amazing pictures.
Italian Roberto Giudici managed to take the pictures while sailing off the Greek Island of Orthoni, in the Ionian Sea, when a huge storm blew up over night.
The morning light then revealed this stunning scene of the four waterspouts, which develop in a similar way to tornadoes but are usually far weaker.
Edited by Still Waters, 03 August 2013 - 02:46 PM.
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