Almost 200 years after it was built, supporters of Thurne Mill have abseiled off the top to help keep the sails turning.
Mill owner Debra Nicholson estimates it will cost at least £10,000 a year to keep the iconic mill, built in 1820 to drain grazing land alongside the River Thurne, working and open to the public.
Throughout today, dozens of people climbed into harnesses and abseiled down the stunning white structure to help put money in the pot.
'The view from up there is amazing,' said Mrs Nicholson, who runs the Wind Energy Museum in neighbouring Repps.
'I've been up there hundreds of times but you always see something different.'
Vick Smith, of Great Yarmouth, was nervous going over the edge, but 'loved' the experience. She said: 'It's that moment as you step over; your body is telling you not to let go but if you listen to the instructor, you go for it. It was great.'
Fellow fundraiser Allison Hodder, of Martham, is not the biggest fan of heights and was 'apprehensive' about being 15 metres from solid ground but, after touching down, said: 'Fantastic. I'm signing up for next year.'
A number of youngsters brought along friends to take part in a teddy bear abseil.
Both abseils, for humans and soft toys, were run by Yarmouth firm AID Rope Access which provides training for offshore workers.
Mrs Nicholson hopes the event, now in its second year, will help keep Thurne Mill running.
Due to funding shortfalls, the Norfolk Windmills Trust – which previously leased and looked after the property since 1979 – will hand the keys back to Mrs Nicholson in August.
It costs £10,000 to repaint Thurne Mill, a task that should be undertaken every five years to keep it looking its best.
The money raised today will also be for ongoing maintenance such as greasing the iron turbine mechanisms once a month, as well as insurance and wider security should the mill break down or be damaged by gale-force winds that sweep across the Broads.
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