Transport: Richmond train station, Kew Gardens tube/train station, Kew Bridge station
Main attractions: Palm House, Treetop walkway, Princess of Wales conservatory
Cost: 16.50 (with donation)
Top tip: Arrive early. This will allow you to enjoy the tranquility of the gardens (and indoor areas) without having to manoeuvre around too many folk. It starts to get busty around lunch on the weekends.
Photos: All my own (Pagoda, Princess of Wales conservatory, Palm House)