National Botanic Garden of Wales

The National Botanic Garden of Wales is a beautiful 568-acre estate in Carmarthenshire with the world's largest single-span glasshouse — a vast elliptical dome designed by Norman Foster, filled with plants from the Mediterranean, South Africa, Chile, California, and the Canary Islands. The Great Glasshouse is a stunning building, and the planting within it is arranged as a Mediterranean landscape rather than in rows — you walk along paths through a convincingly wild-looking terrain. Beyond the glasshouse, the gardens include a double-walled garden, a Japanese garden, a beautiful bog garden (don't laugh — it's gorgeous), and the Waun Las National Nature Reserve, which covers the wider estate with meadows, woodland, and wetland. The Wallace Garden, celebrating the Welsh naturalist Alfred Russel Wallace (who developed the theory of evolution simultaneously with Darwin), opened in 2023. The estate includes a working farm and the British Bird of Prey Centre with flying displays. The café and restaurant use produce from the gardens and local suppliers. It's quieter than the big Cornish gardens, which is part of its charm. Allow a full half-day, especially if you walk the estate trails. A genuinely world-class garden that's still surprisingly unknown outside Wales.