Emergency responders evacuated part of a Cornish campsite as they rescued a man from a sinkhole last month.
Devon and Cornwall Police confirmed it attended the incident on Gwinear Road near Connor Downs on the evening of 24 July.
The force said officers were there "to provide support to emergency services who were responding to a report of a man having fallen into a sinkhole".
It added: "A number of people were cleared from the area for safety."
Cornwall Fire and Rescue Service said it was also called to the incident.
"Firefighters used line rescue equipment to rescue a casualty who was approximately 30ft (9m) down a sinkhole," it added. "The casualty was left in the care of the ambulance service."
A spokesperson for the South Western Ambulance Service NHS Foundation Trust (SWASFT) said: "We were called at 17:49hrs on Friday 24 July to an incident near Cambourne. We sent a double-crewed land ambulance, an air ambulance and an operations officer to the scene. We conveyed one patient by land ambulance to Royal Cornwall Hospital."
Dan and Marie Fenton, partners at Higher Trevaskis Caravan Park, said in a joint statement that they were "extremely relieved" the man was safe after the "frightening incident".
They added: "The safety of our guests was and is our immediate priority, and we followed the appropriate procedures."
The Fentons said specialist mining engineers had subsequently assessed the site and confirmed the park could continue operating safely.
"The historical mine feature is now being professionally capped and permanently secured," they added. "As it was an unrecorded historical feature, we are continuing to work with the relevant specialists.
"There are historical mining maps covering the area and, as a park, we have previously taken steps to have all the known mines identified on those maps professionally capped.
"Unfortunately, this particular historical feature was not recorded, which is why it came as such a shock for all involved."
A 2m deep sinkhole opened behind a bakery in Redruth, Cornwall, last November, engulfing a local man’s parked Mini car.
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Man Saved from 9m Sinkhole at Cornish Campsite