Llanddwyn island is rich in legends, in particular in its association with Dwynwen. The name Llanddwyn means 'The church of St. Dwynwen'. Dwynwen is the Welsh patron saint of lovers, making her the Welsh equivalent of St. Valentine. The island bears the ruined remains of St Dwynwen's Church (Eglwys Santes Dwynwen). Unusually for churches in that region it has a cruciform floorplan.
Archaeologists examined the ruins of St Dwynwen's in 2011 and again in 2021. The 2021 dig discovered traces of even older buildings below the ruins.
The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.