The Giant's Causeway is Northern Ireland's top tourist attraction

He said his department and the Tourist Board had become involved "because key stakeholders had been unable to reach agreement".

Earlier Environment Minister Arlene Foster said she wanted the centre to be built by a private developer.

She said she would make a formal decision at the earliest opportunity.

The previous visitor centre on the site burned down in April 2000.

Nigel Dodds said his department had been involved as "a potential developer of last resort".

'Excess'

"It would not be a prudent use of taxpayers' money to proceed further in the circumstances, given Minister Foster's position on the private sector planning application. The DETI/NITB project would cost in excess of �21m," he said.

The Causeway attracts nearly 500,000 visitors a year.

Renowned for its polygonal columns of layered basalt - resulting from a volcanic eruption 60 million years ago - it is the only World Heritage Site in Northern Ireland.

Ms Foster said she had visited the site and there was considerable merit to the Seaport Investments Ltd plan for a new Visitor and Study Centre at the site.

"I have asked my officials to engage with the developer and key local stakeholders on some aspects of the proposal so that I can make a formal decision on it at the earliest opportunity," she said.