Ynys Llanddwyn is a tidal island just off the coast of Anglesey in North Wales.

When the tide is in, the island is almost entirely cut off from the mainland, however, once the tide goes out, a causeway is revealed, allowing you to walk over to the island.

The island is home to several landmarks including the adorable Tŵr Mawr Lighthouse and the ruins of the Church of St Dwynwen who is the patron saint of lovers.

In fact, the island is named after this church. Ynys Llanddwyn means ‘Island of the Church of St Dwynwen’, however, it’s typically just known as Llanddwyn Island in English.

Although it’s an island, there is a causeway which you can walk across at low tide.

Keep in mind that the causeway to reach the island may be inaccessible at high tide. Signage in the area from the RNLI, who patrol the nearby Llanddwyn Beach, recommended that you leave the island 2 hours before high tide. Check the tide times