You can reach the Sainte Marguerite island with your own ship... or
via public ferry service e.g. from Nice, Cannes or La Napoule.
This multilevel cache, which consists out of two stages, should
be solved comfortable within 2 hours (excl. shipping times).
We recommend to take at summer time enough water, your self
composed picnic and swimming equipment with you to assure the
highest possible enjoyment level for you. [:-)]
One possible starting point is in Cannes at N 43° 32.802', E
007° 00.831'
Have fun and good luck.
Monastère Onze
Note on cache maintenance: I live at the same
time in the south of french and in germany, so the maintenance of
caches at these two places is no problem.