More than £1.1m has so far been spent out of a £2.4m investment programme for tourism connected to mining heritage, Cornwall Council said.
The work is part of the Cornwall and West Devon’s Mining Landscape’s Discover the Extraordinary programme.
It has allowed improvements in tourism facilities in 11 areas of the World Heritage Site.
They include Geevor Tin Mine and Gwennap Pit in Cornwall, and Tavistock Museum in Devon.
The Department for Environment, Food and Rural Affairs and the European Union are funding 87% of the three-year programme, which began in early 2010.
Cornwall Council is providing the rest of the funding.