The Eden Project has secured £17m funding for a geothermal project, drilling 4.5km underground.
This funding will enable the Cornwall visitor attraction to build a power plant which will take energy from the heat in underground granite rocks.
On a site the size of a football pitch, the plant could produce power for the Eden Project and the local area.
The money is from a European fund, Cornwall Council and Institutional investors.
The Eden project is in partnership with EGS Energy, also based in Cornwall.