May 01, 2026

Tŵr Mawr lighthouse on Llanddwyn Island in Anglesey, Wales

Tŵr Mawr lighthouse, Anglesey, Wales

At the far edge of Ynys Llanddwyn, where the land quietly gives way to sea, Tŵr Mawr Lighthouse stands watch without making a fuss. It is not tall, not flashy, but it knows its purpose—and it keeps it bright.

Built in 1845 on Anglesey's southwest coast in Wales, Tŵr Mawr (Great Tower) guided ships through the Menai Strait. At over 10 metres high, its tapered shape hints at a windmill past. It stands near Tŵr Bach (Small Tower), which now carries the active light, while Tŵr Mawr enjoys retirement as a Grade II listed landmark. Back in 1861, its lantern used Argand lamps, a Fresnel lens and a silver-plated reflector.

Set on a tidal island, access depends on the sea's mood, so check the tide tables or risk being cut off. The site has also stepped into the spotlight, featuring in the 2006 film 'Half Light.' Nearby, the old Pilots' Cottages recall a time when crews stayed on watch, guiding ships through the tricky western approach to the strait. Throw in sweeping views towards Snowdonia (Eryri) National Park, and it is no surprise this lighthouse is often camera-ready.