The National Trust has raised money to buy Trevose Head, close to Padstow on Cornwall's north coast, and is now looking for further support to care for the site.
The charity has launched an appeal to raise £250,000 to look after the headland, described as a "true jewel" of the Cornish coast, which went on sale earlier this year with a guide price of £3.5 million.
The 221.5-acre area of headland, which is flanked by popular surfing beaches, includes arable farmland, coastal grassland cliffs, slopes and 2.3 miles of coastline.
Around 1.6 miles of the South West Coast Path runs around the headland, past its lighthouse and a Royal National Lifeboat Institution (RNLI) lifeboat station.
Around 80 acres of the land is part of the Constantine Bay site of special scientific interest (SSSI), protected for its maritime grassland, heath and sea cliffs which are home to plants including the globally rare shore dock and British red-listed wild asparagus.
The National Trust is buying the land with the help of legacies from people who have left money in their will, but the fundraising appeal aims to ensure it has sufficient funds to care for it in the future.
Plans include building a network of new paths to open up the headland for visitors, extending the existing habitat and retaining some areas as farmland, which will be managed with wildlife-friendly measures such as planting more hedgerows.
It will be one of the most easily accessible and significant sites for seeing species such as grey seals and peregrine falcons, the trust said.
Nick Lawrence, assistant director of operations for the National Trust in the South West, said: "This is a beautiful place, a true jewel on the north Cornwall coast.
"We have a great opportunity to ensure this piece of coastline is a fantastic place for both nature and people forever and honour the gifts in wills given to us for the purpose of acquiring Trevose Head.
"It is only thanks to these generous gifts that we have been in a position to acquire this important headland.
"This is a once-in-a-lifetime opportunity to permanently secure and protect this headland for everyone to enjoy. We now need our supporters to help us care for Trevose Head forever by donating to our Trevose Head campaign, launched today."
Tim Ryland of Lodge & Thomas estate agents, representing the vendor, said: "The owner of Trevose is delighted the National Trust has agreed to buy Trevose Head.
"It's a place that is held dear and they wanted to ensure its future was secure. They are confident that the National Trust will continue to care for it as the vendor has done for many years and will enable the local community and visitors alike to continue to enjoy this magnificent landscape."
The purchase will add to the 775 miles of coastline around England, Wales and Northern Ireland the National Trust looks after, including 152 miles in Cornwall.
For information on how to donate to the appeal, visit here.