Lake Vyrnwy: The Welsh Reservoir With a Drowned Village Underneath It

No affiliate links in this one. Just a stop on the way home.

It is 3am, a few nights after we got back, and I am reading about a Victorian water company that flooded an entire Welsh village on purpose. We had driven past Lake Vyrnwy a hundred times without really stopping to think about it. This time we stopped, and it turns out there is a lot more under that water than fish.

An easy detour on the way home from Henstent

Lake Vyrnwy is only 20 minutes from Henstent Park, where we had just spent the weekend, so on the way home we parked up between the dam and Bethania watersports. Easy parking for a 6 metre van, no drama. From there it is a 10 minute walk up the lakeside to a little beach, where we sat with the dogs and did nothing much beyond admiring the view for a while. Then on to a tiny cafe near the Chocolate Cabin for a coffee before the drive home.

Honest caveat: the drive from Henstent to Vyrnwy is genuinely scenic, but several miles of it are single-track lane, and it was not entirely stress-free even in the Giottivan. I would not want to do that particular stretch in a bigger van. Once at the lake itself, the road around it is normal width and the parking is straightforward.

The village Lake Vyrnwy drowned

Lake Vyrnwy is not a natural lake. It is a Victorian reservoir, built in the 1880s by Liverpool Corporation to supply fresh drinking water to Liverpool and Merseyside. The dam was completed in 1888 and was the first large stone-built dam in the UK, and the first anywhere designed to let surplus water cascade straight over its face rather than through a side channel. It is still an impressive thing to stand next to.

Building it meant flooding the head of the valley, and with it the original village of Llanwddyn. It was a proper village too, not a hamlet: two chapels, three inns, ten farmhouses, and 37 houses, plus a manor house called Eunant Hall that was demolished and never rebuilt. People carried on living in the old village right up until the work was finished. A new Llanwddyn, the name it still carries today, was built about two miles away on higher ground, complete with a new church that was consecrated the day before the valves closed and the valley began to fill. The population today is around 300.

The old village never fully disappears, either. In genuine drought years the water level drops low enough that the foundations of the original buildings resurface, most recently getting attention during the 2022 heatwave. We were not lucky or unlucky enough to see any of that ourselves, the lake was full when we visited, but knowing it is down there changes how you look at the water.

The village today

Modern Llanwddyn sits above the waterline with holiday statics and lodges scattered up the hillside, a proper little tourist economy built around the lake and the RSPB reserve it now supports. Cujo and Blaze found their own stretch of stream near the static caravans to cool off in, which by that point in the weekend had become the theme of the whole trip.

Worth the stop

We have driven past Lake Vyrnwy more times than I can count without really stopping. This time, twenty minutes and a short walk turned it from a nice view out of the window into somewhere with an actual story attached, and a slightly uncomfortable one at that: a whole community moved, more or less on Liverpool’s timetable, so a city could have water. Worth building into any trip through this part of Wales, whether you are coming from Henstent Park or exploring the wider area covered in our North Wales campervan sites roundup.

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About the author

I’m Pete Harrison. I’m 55, I run a business, and I have a mild case of insomnia that means I spend a lot of time at 3am reading about gadgets, gear and, this time, Victorian reservoir engineering. Things I Learnt at 3am is where I write honestly about the things I’ve actually bought, tested and lived with. No fluff, no rehashing the spec sheet. Just the real verdict from someone who uses this stuff every day.