Kew Gardens
With one of Europe’s most comprehensive holly collections, a 40-acre arboretum brimming with evergreens, plus a grass garden where feathery seedheads glow in the pale winter sun, the Royal Botanic Gardens at Kew definitely warrant an off-season visit. Warm up in the glasshouses while admiring collections of temperate and tropical plants, or explore the new Winter Mound garden, designed to bring