A dinosaur footprint set in rocks near Scarborough for hundreds of millions of years is being moved.
The operation to lift it is being led by members of the North East Yorkshire Geology Trust, one of whose members found the print this year.
The mid-Jurassic period print is that of a megalosaurus-type dinosaur, a distant relative of tyrannosaurus rex.
The operation to lift it from the cliff edge will involve divers, a specially constructed raft and a helicopter.
The footprint will be put into storage until work on Scarborough's Rotunda museum is complete, when it will go on public display.