THIS amazing photo shows a full-circle Rainbow over Stonehenge.

An incredibly rare sight at the best of times, a full radial rainbow is known as a 'Glory', and one keen photographer was lucky enough to snap a picture of one at Wiltshire's famous landmark.

Nick Bull, also known as Stonehenge Dronescapes, took this incredible photo and shared it in the Salisbury Journal Camera Club on Facebook.

SEE ALSO: Beautiful photo captures Full Wolf Moon over Stonehenge

Nick captured the photo on Friday, March 15, and shared it in the Facebook group with the caption: "With showers due throughout late afternoon I had to go and spend a few hours rainbow chasing and was met with one after just 10 minutes.

Salisbury Journal: Full circle 'Glory' rainbow over StonehengeFull circle 'Glory' rainbow over Stonehenge (Image: Nick Bull/Stonehenge Dronescapes)

 "This was the second one an hour later and had to capture it with six images from three rows and two columns."

According to the Met Office, to be able to see a full circle rainbow you need to be able to see water droplets below your observable horizon - if you are standing on top of a tall building or looking out of an aircraft then you may have water droplets and sun.

The key factor that determines how much of a rainbow we see is our visual reference point. In most cases we only see less than half of a circle - the characteristic rainbow arc we are all familiar with.

However, if you are lucky enough to be in the right position at the right time, you can see a full circle rainbow in all its splendour.