A Forgotten Chamber Under Happy Valley
Beneath Happy Valley, one of Conwy's oldest public parks in North Wales, sits a sprawling Victorian reservoir that most visitors to the seaside resort of Llandudno never knew existed. Known as Y Fach, the underground chamber stretches across a third of an acre and contains 248 redbrick arches rising 19 feet overhead. Built during Llandudno's 19th-century boom to supply the growing town with water, the reservoir was drained mid-century and has sat largely unused since.
Now a team of local cultural producers is planning to reopen the space as Llandudno Vaults, an immersive arts venue centered on Welsh mythology and folklore. The project recently secured £20,000 through the Immersive Arts programme and is awaiting planning approval before setting an opening date.
Mythology Meets Victorian Engineering
The concept behind Llandudno Vaults hinges on the interplay between the reservoir's physical qualities and the stories embedded in Welsh tradition. The vaulted brick interior, with its natural acoustics and residual dampness, will serve as the backdrop for performances that respond to audience participation. Visitors will encounter creatures from Welsh lore, including the Afanc, a lake monster said to dwell in deep waters, and the Cŵn Annwn, spectral hounds from the otherworld.
According to the project team, the experience will use projection, sound design, and live performance to make those myths tangible. Participants might chant together to calm a mythical beast, watch water erupt in response to crowd noise, or see ghostly figures pass through the arched walls. The aim is to place audiences inside the narrative rather than position them as passive observers.
The format reflects a broader shift in cultural tourism toward participatory experiences, particularly in sites with strong historical or architectural character. Disused industrial and civic infrastructure, from gasworks to reservoirs, increasingly offers both atmospheric setting and a ready-made narrative of transformation.
Local Support and Regional Ambitions
The project has drawn backing from Conwy councillors, with Nigel Smith, Cabinet Member for Sustainable Economy, describing it as having the potential to become one of Llandudno's major attractions. That endorsement matters in a town whose economy relies heavily on visitors but has traditionally centered on beach access, the Great Orme headland, and Victorian pier heritage.
Llandudno Vaults represents a bet that cultural programming rooted in Welsh identity can pull a different kind of traveler, one looking for narrative depth and creative engagement rather than conventional sightseeing. Whether the model proves financially sustainable will depend on repeat visits, group bookings, and the venue's ability to refresh programming over time.
What Happens Next
The timeline remains uncertain. Planning approval will determine whether structural modifications to the reservoir are feasible and what safety requirements must be met for public access. Funding beyond the initial £20,000 will likely be needed to complete the build-out, install technical systems, and develop the performance repertoire.
If the project moves forward, Llandudno Vaults will join a small but growing roster of underground heritage sites repurposed for cultural use across the UK, from Edinburgh's vaults to London's disused Tube stations. The Welsh iteration, however, stakes its identity not on general history but on a specific mythological tradition, one that has seen renewed interest in recent years through literature, television, and regional tourism campaigns.
For now, Y Fach remains quiet beneath the park. But if the plan succeeds, the reservoir's long silence will give way to something altogether louder and stranger.
