Kew Gardens

This 500-acre botanic garden in southwest London is home to the largest and most diverse botanical and mycological collections in the world. In addition to its conservatories and tree-lined walkways, notable features include a ten-storey 18th-century Chinese pagoda, a Japanese gateway, the 19th-century Palm House and other Victorian glasshouses, the Princess of Wales Conservatory and the red-brick 1631 Kew Palace, which served as King George III's country retreat.