A top attraction has quadrupled visitor numbers and spent £1.6m revamping accommodation to support a rise in adventure and heritage tourism.
The Slate Caverns in Blaenau Ffestiniog is also employing more staff than it has since the mid-1990s, following a 2011 restructure which changed the fortunes of the ailing company.
JW Greaves has operated the mine for almost 200 years and oversaw its rise to become one of the most popular destinations in north west Wales.
But a decline in fortunes at the turn of the century saw visitor numbers drop to 50,000 a year and the quarry make significant losses.
Alastair Altham, a cousin of the founding family, became chairman 10 years ago and was joined by Michael Bewick as managing director in 2011. Together with David Williams Ellis, the Board and team began restructuring with a clear vision for its future.
Numbers have increased to around 225,000 and look set to keep rising, a resurgence which coincides with the North Wales Growth Bid, a series of programmes designed to secure more than £1.3bn investment into the area.
The site, which comprises more than 2,000 acres in the heart of Snowdonia, has a new heritage offer and capitalised on the success of adventure tourism, notably that of its tenants Zip World and community company Antur Stiniog's mountain bike trails.
Mr Bewick backs the Bid and says improvements in transport, digital connectivity and skills in particular will have a positive impact on all business in rural areas, as well as the inclusion of Adventure Tourism as a key programme.
"At the time of restructuring the firm was losing money and shareholders provided support well in excess of £1.5m to keep it afloat," he said.
"Now we are profitable, growing and investing in the future, and that's had a knock-on effect for the supply chain and our tenants, such as Northern Welsh Quarries, which now employs eight people.
"The tourism side of our business employs 60 people at peak times with well over 100 in the other tourist activities, bringing us to the highest employment levels on site for 20 years and making a real contribution to the local economy."
The site is set to continue to improve with the investment of the £1.6million which will go towards new facilities. In the pipline is new accommodation, six safari tents with en suite bathrooms, wood burning stoves and spectacular views which are fully book for the summer.
There are also more plans for a major attraction in 2020 which it’s underway involving the adventure tourism sector, whilst the next plan includes the conversion of Plas Weunydd into a four star hotel which will also launch to the public in 2020 having been let to an engineering company for 2019.
On a visit from Gwynedd council leader and Growth Bid vice-chairman Cllr Dyfrig Siencyn, he said: "This is a region which is growing in stature and adventure tourism has played a major role in that, so we certainly welcome the Bid.
"With The Slate Caverns set to be the gateway to a proposed World Heritage Site for the Welsh slate industry, we are well-placed to build on these projects and continue to grow."
"To see this investment in accommodation, tourism and heritage is a major boost to the region.
"The North Wales Growth Bid and our vision for the whole region is to support businesses like this in different industries, giving them the tools and a platform on which they can grow.
"Congratulations to everyone at JW Greaves and thank you for supporting our Bid for more investment into infrastructure and key projects in North Wales."
For more, visit www.llechwedd-slate-caverns.co.uk