It's an uninhabitable granite island situated more than 200 miles off Scotland's west coast.
To date just 110 people have successfully landed on Rockall in the past two centuries. Only five have stayed for more than one night.
Now, four adventurers including Cam Cameron from Moray will live on the lone rock, which pokes out of the North Atlantic.
Their week-long challenge will involve enduring extreme weather conditions and sleeping on the rock’s one metre long ridge.
Their aim is survival, as well as raising one million pounds for the Children’s Hospice and the Royal Navy and Marine's Charity.
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