Mentioned by London x London
The London Sightseeing Guide: 39 Unmissable Things to do in London
"Take a break from the hustle and bustle of London and retreat to the beautiful and relaxing Kew Gardens. This green oasis in southwest London is believed to be the largest and most diverse botanical garden on earth. You can book single visits online, or if you’re a local, you might like to consider becoming a member for free entry year-round."