An 18th Century copper mine on the north coast of Anglesey is the subject of a bid for a £15m lottery grant.
The Copper Kingdom bid would promote Mynydd Parys as a 'Living Landmark'
The Copper Kingdom project plans to develop the old mine workings on Mynydd Parys near Amlwch as a tourist attraction.
If successful the scheme would also link to Amlwch's heritage as an important port and ship-building centre.
Anglesey council is bidding for money under the Big Lottery Fund.
The Living Landmarks project hopes to boost the local economy.
At the end of the 18th Century, Amlwch was the second largest town in Wales due to the discovery of copper on the mountain.
At their peak, the mines produced over 3,000 tonnes of metal a year, dominating world markets.
Associated with the mines a thriving shipping industry developed at the town's port.
There is also evidence of Bronze Age and possibly, Roman workings on the site.
The Copper Kingdom project has been put together by the Amlwch Industrial Heritage Trust to draw on all these elements.
Trust chairman Gareth Jones sees the project as "a real opportunity to turn our dreams into a reality."
"This project has huge potential benefits for Amlwch, surrounding area and the whole of Anglesey," he added.
The bid for the Big Lottery Fund's Living Landmarks grant is backed by town and county councils and Isle of Anglesey Charitable Trust.
"The Copper Kingdom project would create a high quality visitor destination, drawing thousands of tourists, raising both community and business confidence," said Anglesey's council's economic development portfolio holder Gareth Winston Roberts.
"This would then result in sustainable regeneration benefits for the local community and the wider communities of Anglesey," he added.
As well as the tourism plans, there is interest in opening new commercial workings to the north and west of the original sites.