Holiday park visitors in Dorset and Devon have raised more than £43,000 over the last five years towards education and conservation of the Jurassic Coast.
West Dorset Leisure Holidays, who own and manage five parks in West Dorset, are among those recognised as major supporters of the Dorset and East Devon World Heritage Site.
The company has raised more than £31,000 by encouraging visitors to make a small donation on top of the cost of their stay at their Golden Cap, Graston Copse, Highlands End, Sandyholme and Larkfield Holiday Parks.
Other holiday parks that have made contributions include Durdle Door Holiday Park which has raised almost £2,000.
Several groups have benefited from the fundraising including the Durlston Castle visitor centre, the Chesil Beach centre, the Litter Free Coast and Sea campaign and local schools.
James Weld, chairman of the Jurassic Coast Trust, said: "Visitor Payback is a recognised way of fundraising for World Heritage and other sites of outstanding cultural and environmental interest. A small donation, of between £1 and £5 added to the bill is readily accepted by 90% of customers.
"People are drawn to organisations with strong charitable ethics."
The Visitor Payback approach is part of the Jurassic Coast Business Partner scheme, which recognises businesses that share the vision and values of the Jurassic Coast and who raise funds to help achieve this vision.