National Botanic Garden of Wales

The National Botanic Garden of Wales (Welsh: Gardd Fotaneg Genedlaethol Cymru) is a botanical garden located in Llanarthney in the River Tywi valley, Carmarthenshire, Wales. The garden is both a visitor attraction and a centre for botanical research and conservation, and features the world's largest single-span glasshouse, measuring 110 m (360 ft) long by 60 m (200 ft) wide.

The National Botanic Garden of Wales seeks "to develop a viable world-class national botanic garden dedicated to the research and conservation of biodiversity, lifelong learning and the enjoyment of the visitor." The garden is a registered charity reliant upon funding from visitors, friends, grants and gifts. Significant start-up costs were shared with the UK Millennium Fund.