Set amidst breathtakingly beautiful scenery on the banks of the Menai Strait, this elegant house was redesigned by James Wyatt in the 18th century and is an interesting mixture of classical and Gothic. The comfortable interior, restyled in the 1930s, is famous for its association with Rex Whistler, whose largest painting is here. There is also an exhibition about his work. A military museum contains campaign relics of the 1st Marquess of Anglesey, who commanded the cavalry at the Battle of Waterloo. There is a fine spring garden and Australasian arboretum with an understorey of shrubs and wild flowers, as well as a summer terrace and, later, massed hydrangeas and autumn colour. A woodland walk gives access to a marine walk on the Menai Strait. What’s new in 2004: Woodland walk with observation hide and view point. Impressive views of Yr Eifl mountains, the Church of Llanedwen and Bryn Yr Hen Bobl (no access to site)