Leszek Dobrowolski
Google
A calm place outside the main tourist areas of Juan-les-Pins. There is only a one entrance open - from the south side - look out for Chemin Gustave Raymond. There is no entrance fee as long you are individual and not in a large group. Leaflets and a map are available at the entrance gate. According to it, there are toilettes available on the premise, I haven't verified it.
The arboretum and its research work is focused on adaptation of foreign plants to Mediterranean climate and divided into thematic sections shown on the map. They are well described at the paths in French, English and Italian. Apart from that, most of individual trees are labeled with a Latin, French and English name.
After a 10-15 minutes walk downhill you can reach the seaside. No cafés or shops inside and nearby the place itself.