According to the Guinness World Records (info from 2004):
Hampton Court, near London, UK, had 2 million visitors in 1996. The garden has the oldest yew hedge maze in England. Sir Christopher Wren was... more
The Royal Botanic Gardens, Kew, Surrey, England, had 1,000,015 paying visitors in 1996. Most of the plants on display are wild species rather than... more
The largest garden is arguably that created by Andre Le Notre at Versailles, France, in the late 17th century, for Louis XIV. Created in what had... more
The Royal Botanic Gardens, Kew, Surrey, UK, has the tallest known specimens of 138 species of tree.... more
Bridgemere Garden World, Cheshire, UK, covers 10.1 ha (25 acres). A separate display garden called The Garden Kingdom covers... more