Scottish Highlands
Sophie, the Countess of Wessex, took the picture in the Scottish Highlands in 2003.
"Please stay at home, our community is not your bolt hole."
Andrew Vine was last seen on Friday.
The mercury rose to an "exceptional" 16.8C.
Some 19,000 people have signed up to the Facebook event in the Scottish Highlands, which promises "to find dat big boi".
The pair went missing on Thursday.
Travel disruption and power cuts could be ahead.