The Royal Botanic Gardens, Kew, located in London, is a renowned botanical garden and a UNESCO World Heritage Site that serves as a center for botanical research and ex situ conservation of plant species. It is famous for its extensive collection of plants, including over 30,000 living species, and its contributions to global conservation efforts and scientific research. Kew Gardens plays a vital role in the preservation of biodiversity by maintaining living collections and conducting research to understand and protect endangered plant species.