Mentioned by planetware.com
19 Top-Rated Tourist Attractions in London | PlanetWare
"Kew Gardens — officially called the Royal Botanic Gardens — is situated in southwest London on the south bank of the Thames and is a wonderful place to visit as you enjoy the numerous plants grown amid its 300 acres. Laid out in 1759, the gardens became government property in 1841. In 1897, Queen Victoria added Queen's Cottage and the adjoining woodland."