Spend a full day at Kew Gardens with Johan West, renowned horticulturist and botanist, as your tour guide. Kew Gardens is a botanical garden in south-west London and houses the "largest and most diverse botanical and mycological collections in the world". Founded in 1840, from the exotic garden at Kew Park in the London Borough of Richmond upon Thames, UK, its living collections include more than 30,000 different kinds of plants, while the herbarium, which is one of the largest in the world, has over seven million preserved plant specimens. The library contains more than 750,000 volumes, and the illustrations collection contains more than 175,000 prints and drawings of plants. It is one of London's top tourist attractions and is a World Heritage Site.