A couple were cautioned by police on Saturday night after they were discovered having sex in the cab of a crane on the building site on Dundas Street.
Police went to the building site to investigate after bystanders spotted the couple climbing into the cab of the crane. An officer's command to come down was followed by a naked foot popping over the railing, police said.
The officer noted the couple then got dressed and climbed down.
The man, who worked at the site and had keys to the crane, told officers he was photographing the town skyline.
Pc Stanley Mole, Saltburn's Community Police officer was unavailable for comment as he was playing golf.