The 121-hectare (300-acre) gardens, with many expansive lawns, earned a spot on the UNESCO list of World Heritage Sites in 2003. As you’d expect, the glasshouses are world-class—there are 2,000 varieties of plants, many descended from specimens collected in the earliest days of international sea trade. Of the seven conservatories, the domed Palm House, built from 1844 to 1848 and jungle-warm, is probably the world’s most recognizable greenhouse, while the Temperate House is the world’s largest glasshouse containing the world’s largest indoor plant (the 17.7m/58-ft.-tall Chilean wine-palm, planted in 1843—not a typo). It’s undergoing a £34 million restoration until 2018 but they’ve relocated most of its plants (except the Encephalartos woodii cycad, extinct in the wild and too fragile to move). Other attractions include a bamboo garden, a water lily pond, Treehouse Towers (a tree-themed play area for children aged 3–11), and, it must be said, a heartwarmingly charming village outside the gates. The gardeners are champs; in 1986, they coaxed a bloom from a portea that hadn’t flowered in 160 years. Kew’s contributions to botanical science are ongoing since 1759, but not mired in the past; it also provides a free app that lets you scan labels to learn more and find blooms. Unless you’re a fevered horticulturalist, it will ultimately feel like a park you have to pay for—and a lot at that. Also be aware that many of the goodies clamp down in winter (including Kew Palace, included in the price), so this is best in the summer.